It’s egg season. But rattlesnake eggs? Never. We get a good number of calls and inquiries about rattlesnake eggs in the backyard, but we can tell you right now: the eggs you see are not from a rattlesnake.
But, the reasons why a person might think so can be interesting. Here’s our take, and a note for those of us who devote our time to work with the public on matters of reptile conservation.
Why is it so common to think bird eggs are rattlesnake eggs?
Human brains are tricky. Be clear: this situation is a perfectly normal part of the way we often approach the unknown. Because we know a thing or two about snakes, and you likely do as well, means little – it’s something we all do. It’s a form of confirmation bias. Once an idea is in play, it’s difficult to start from a clean slate and inaccurate answers can be the result.
You’re likely familiar with hikers posting photos of dog tracks in the mud, commenting “is this a mountain lion? I think it’s a mountain lion” … and regardless of subsequent comments and evidence showing that it’s just a dog print, the initial assessment remains: there was a Mountain Lion here until proven otherwise.
We are all subject to confirmation bias. Yes, even you.
It’s a logical process issue we all can be subject to, where the least likely, but most interesting situation is the default thought, with evidence used to reluctantly disprove rather than inform.
This shows up here in rattlesnake world with things like the common misidentification of the Southwestern Speckled Rattlesnake as the cooler-sounding and less often seen Tiger Rattlesnake. Or the “Mojave Green” rattlesnakes draped across mountainous landscapes across the west, which are of course something else entirely. And even lizards get this, where it’s not uncommon for us to see Chuckwallas initially labeled as a venomous Gila monster. It’s also covered here in our video about how to tell the difference between a Mojave Rattlesnake and Western Diamondback Rattlesnake (https://rattlesnakesolutions.com/mvd)
So what does a person tend to do when faced with mysterious eggs in the backyard. Could they be from the birds back there every day, or the lizards on the block walls … once the idea that they could be from a rattlesnake creeps in, everything else falls away. And, thankfully, we can always answer with complete certainty when asked.
It’s just another aspect of how interesting thought processes are when it comes to anxiety-producing topics, like rattlesnakes. The longer we do this work, the more time is spent understanding the thought processes themselves, rather than be frustrated with the results. Education is certainly important, and we all know that fear and ignorance go hand-in-hand. However, what can feel like an endless, helpless situation can change when we focus on how these thoughts are produced, protected, and perpetuated.
A community may never care for rattlesnakes, and that’s not a surprise. But they certainly care about other things: how they fit into the local culture, how useful or beneficial are they to their “tribe”, which aspects of a personality are desirable to express, and so on. By thinking about how rattlesnakes might fit into those boxes for an individual, or a community, change can be acheived. When being knowledgeable and kind to wildlife, including rattlesnakes, becomes a mark of local importance with all of the social benefits therein: watch what happens.
As rattlesnakes start to show up on the surface again this year, a few things are predictable. Some hikers and homeowners will report rattlesnake sightings, complete with photos of usually-sleeping snakes, with various warnings and declarations about warm winters and misreads on words like ‘brumation’.
So we’ll state plainly and to the point: rattlesnakes are not coming out early; it is typical every year for rattlesnakes to begin the early staging portion of den egress in mid-February.
This is based on our relocation data from more than 14 years of operation, as well as field observations from our team over the past 20 years. It’s also just keeping track of when these sightings tend to start each year, which is easier than ever thanks to social media. We can state with complete accuracy that the rattlesnake emergence activity right now (February 2024) is typical and going as planned.
In the next two weeks, sightings will increase, but rattlesnakes will not be out and about just yet. This “staging” part involves a lot of laying around in the sun near the entrance to their den. That might be sleeping in the grass right next to it, lounging under a nearby bush, or coiled on top of a packrat nest. They may make short movements, but are still tethered to the den until springtime conditions stabilize in March.
A Western Diamondback Rattlesnake doing its thing, as they do every February. This snake will hang out, along with a few others, right around the entrance to its winter den for a few weeks before leaving for the Spring. Most people would never see this without intentionally seeking it, so don’t worry.
How to avoid rattlesnakes in the staging period of den egress
Hikers can avoid rattlesnakes right now by simply staying on the trails. If you notice, most of the posts from hikers on social media where a rattlesnake is spotted are off-trail, climbing boulder piles or other situations where seeing a rattlesnake might even be expected. In comparison, a trail with people coming and going is not a place that most rattlesnakes will want to deal with for these sensitive situations, and will avoid them. Put your dog on a leash if it isn’t already, and it’s time to put the headphones away for the year.
Homeowners who see rattlesnakes in February should know that they’ve likely been there for months at this point, and it’s possible there are others on the property. If you’re doing any work like a garage cleanout, using a grill island, anything involving the pool equipment area, or general yard cleanup, be aware that this is when rattlesnakes might show themselves. And if you do see one, AVOID the fire department’s version of “rattlesnake relocation”, which is to dump it on the other side of the fence … which this time of year would guarantee an immediate return to the place of capture or a neighbor’s property.
Rattlesnakes may be visible, but prime rattlesnake encounter time is still a month or more away
Think of what they’re doing right now like this. It’s that part of the morning where you’re getting up and pouring some coffee. Maybe you’re checking some email or texts from overnight, but you’re not getting into all that right now. You’ve got that 45 minutes or so to let your brain adjust to daytime, and those sweat pants aren’t going anywhere for now. Think of rattlesnake activity in February like this, and for many of us, it will make perfect sense.
You can keep an eye on how the overall rattlesnake season is progressing by looking at our Rattlesnake Activity Forecast: based on real-time snake relocation information coming into our hotline. As you can see for today, it’s not something to really concern yourself with.
Some easy responses to common comments about rattlesnakes in February:
“OMG they’re out early!”
No, this is very normal. Every year, rattlesnakes start the den egress process in favorable conditions starting as early as January.
“I’m done hiking for the year!”
That’s unfortunate! While the fear of rattlesnakes may be real, the danger is relatively easy to mitigate. If hiking is something you enjoy, working on learning to feel ok out there to keep hiking the other 9 months of the year may be worthwhile.
“They never go away for the winter”
Sure they do. Being on the surface at the den is part of the larger, complex behavior of hibernation. While it’s true that in some conditions rattlesnakes can be seen in specific locations at any time of year, this behavior is largely predictable and to compare behavior over the winter months to, say, April, is simply inaccurate.
It’s that time of year when every rattlesnake sighting prompts the question: when will rattlesnakes disappear for the winter? It’s a topic that causes some confusion with many people who believe that reptiles only want heat, and as soon as it starts to cool, they disappear entirely. But like many things with animals, the reality of the situation is much more complicated. Fortunately, after more than a decade of working with homeowners on conflict situations, during this time of year, we have the data to answer this question quite accurately. This observational assessment is based on the frequency, timing, and nature of the more than 15,000 snake relocation calls we have run since 2009.
Late October is peak time for rattlesnake encounters. This is completely normal. While there is no calendar for wild animals, there are some strong trends that are more or less true every year. Even though it’s still hot outside right now, we see no reason to believe this year will be any different. Here’s the timeline:
Throughout October, rattlesnakes are moving. By the third week of October, much of this activity takes place in a short window of time immediately after dark. This may only be an hour, where everything appears to move at once. Encounters with the snakes, may also happen in the early morning, as people see them resting in the temporary location they have selected. This behavior will reach a peak in the last days of October, through the first week of November. By the second week of November, even this behavior begins to wane. By the end of the second week of November, most rattlesnakes are where they intend to be for the winter and the encounter is driven by their traveling and mating. Behavior will have more or less ended. By Thanksgiving, any rattlesnake relocation requests we receive are snakes that are in garage, or other on property hibernaculum, indicating ingress has completed.
A screenshot from our Rattlesnake Activity Forecast tool, driven by real-time data from snake relocation hotline activity. You can watch it at the Rattlesnake Solutions website.
Late October rattlesnake encounters are perfectly normal
As days, go, shorter, and temperatures drop, usually, rattlesnake activity is going to change in a number of ways. First, although some may hunt and continue to do so later into the year, most are in transit. They are moving towards areas that they have selected to spend the winter. Some rattlesnakes like the young of the year or those who have been displaced by construction or other issues, may be in a wandering pattern, looking for a suitable spot. Others, maybe successful adult rattlesnakes that know exactly where to go, and they are moving in a straight line to get there.
Along the way, there may be conflict with humans. This could be, as the snake is crawling through a backyard and, spotted by the dog, forgets held up in a maze of block, walls and stucco. And increasingly, the overwinter destination itself may be on the property. This could be in a garage, under a shed, in the foundation of a home, under slabs of concrete, under air conditioning, or pool, equipment, and any number of scenarios.
The nature of these encounters can be different, because unlike those in the spring, where temperatures and day links were similar, the objectives of the animals may be different. Setting up ambush positions to hunt is no longer a priority, and rattlesnakes may be more likely to rattle out a person or a pet that discovers them as they are in transit. While in the spring time, most rattlesnake encounters at homes may be a snake soundly coiled in a corner, in this time of year it’s usually a snake on the crawl or moving across the surface. With winter, approaching, and the opportunity to hunt in the cool weather, drawing to a close, rattlesnakes are in conservation mode. Essentially, they have the food, energy and water that they have, and it’s time to get to a place for the winter to hang onto it. Remaining above ground, even in otherwise favorable conditions, has no benefit, and may only serve two accelerate the desiccation that may occur in an Arizona dry winter. Rattlesnakes in the low desert may even select overwintering sites that are cooler, to keep a lower, metabolism and slow, the loss of resources.
The fall is also mating, season, again. Wow, much of this behavior happens in advance of moving towards dens, it still occurs up until the end. This can mean that, in addition to traveling rattlesnakes, a homeowner can see pairs in courtship or mating. However, while this behavior is common, it does not seem to drive encounters the same way that it does in the spring time. In March for example if we find an adult female Western Diamondback Rattlesnake, we can often find males in the area searching for her. This is such a strong driver of encounters that in peak spring time, mating season, this might be something that we even expect. In the fall, however, this does not seem to be the case and courtship and meeting may be an aspect of opportunity as snakes continue to come together anyway to group social situations.
Rattlesnakes can still be encountered in the winter
Once snakes are in their dens, it does not mean that homeowners don’t need to think about them during the winter. Please note that I did not use the word “fear” there, as it isn’t necessary or helpful when all that must be done is to remain rational and, take minor precautions. This means that if you live in an area where rattlesnakes can occur, just do as you always would, and follow the basic rattlesnake safety measures you do the rest of the year. Don’t reach where you can’t see, always watch where you walk even on cold days and nights, use flashlights and wear shoes, etc. Just because rattlesnake encounters are much less frequent does not mean they don’t occur, in fact, they often do, so just stay sharp.
Western Diamondback Rattlesnakes using a packrat nest built into a rock pile as a winter den. These situations are often emulated on properties, and rattlesnakes move right in.
Keep rattlesnakes from using your property as a den:
Here are some things that you can do as a homeowner, often relatively easily, to reduce the chances of your property, becoming a rattlesnake den. If this is a concern, devote hey Saturday, and in most cases, you can be done in that time one.
Identify and remove any deep hiding opportunities. This might mean pavers stored along the side, yard, those cinderblocks you meant to do something with, but the project has stalled, the old pool toy box full of deflated floaties, etc. Any items that are stored, long-term and not disturbed can create thermal protection that rattlesnakes and other animals can use
Move the firewood stack to a different location. In fact, do this once a year. It doesn’t need to be far; you can just move it right next to the original location if you choose, but just make sure that it is not a permanent location. Firewood piles are a favorite for rodents and the holes that they dig can be used by rattlesnakes. We often are called to remove rattlesnakes from firewood piles during the winter, and simply moving them, seems to prevent that quite well.
Find and repair any openings into the foundation of structures. These do not need to be large openings, they can even be what look like in minor cracks, going up into the flashing, or a wall joint that has eroded or settled. This can also include sheds or other secondary structures, built on concrete pads that have rodent tunnels going under them or other openings. The quick fix is expanding foam, easily obtainable at any hardware store, while the long-term fix can be arranged.
Learn what a packrat (wood rat) nest looks like and destroy the ones you find on your property. Paquerette nests are favorite homes for rattlesnakes at any time of year, including the winter. Rattlesnakes live alongside these rodents in these often deep and well insulated spaces. To remove a packrat nest permanently, traps, and other rodent control won’t do the trick. Destroy the nest itself. You can do this by flooding it entirely with a garden hose several times, then using garden tools to remove and spread the surface debris and collapse all entrances. Repeat until it is no longer being repaired by the rodent. This single step may be the most important one in this list.
Repair any gaps in garage door seals or call somebody to make sure that gets done. If you see debris and dirt in the corners alongside the edges of garage doors, that means that they are not sealed and animals, including rattlesnakes can get in. You may also want to use this time to get to that long, awaited garage, clean out, and re-organization you wanted to do forever. Cluttered garage are great places for a rattlesnake to spend the winter undisturbed in safety and relative warmth, and they often do. Because it’s a long corners and walls, and reduce the number of hiding spots as much as possible.
Check the areas around seldom visited parts of the yard, like the pool pump, equipment, and air conditioning units. These are often mounted on concrete pads which rodents do you under to create spaces. These are also out-of-the-way locations that people don’t visit very much and as a result, the place where things like bricks and discarded pool toys end up being discarded. Clean up any of these items and fill or collapse any rodent holes going underneath.
If your yard has large and extensive tracts of low-cover landscaping, such as lantana, rosemary, and natal plum, consider upgrading to less rattlesnake-friendly plants. These popular landscape vegetation choices, often create inches of rotting organic material underneath while also retaining moisture We have removed hundreds of rattlesnakes from the situation at homes over the years.
If your property uses riprap, or other piled rock, as decorative or erosion control material, be cautious. The best situation in either case is that the rock is situated to be no more than one or two rock layers deep. This means that each rock in the layer is exposed to the sun and touching the ground. This is not necessarily a useful feature to be a rattlesnake if done like this. If the rock is several layers, deep, however, creating spaces and thermal opportunities within, rattlesnakes, and other animals will, of course find this useful, and perhaps no time more so than in the winter. If this rock area is made of piles of cantaloupe-to-watermelon sized boulders, and several feet thick, you can probably count on rattlesnakes using it. Of course, this rock may be in place for functional needs like erosion control, but if you have an abundance of rattlesnake visits throughout the spring, it may be worthwhile to consider other options
Be especially cautious, when pulling out items from storage that have been there for a long time without being disturbed. Specifically, holiday decorations. It is likely that your plastic Christmas tree and box of tangled lights have been sitting in the same corner of the storage shed without being looked at since you put them there last January, that means by the time you reach for them again in December, they have served only as a potential hiding spot for animals that doesn’t want to be disturbed. This is the same for Halloween, Thanksgiving, New Year, or whatever other holiday or overwinter things you might only look at once a year.
If there has been a dry period for more than two months, and rain comes, rattlesnakes will come out of the den to drink it. This will happen in any temperatures above freezing. That means that if it is the middle of December, and it’s midnight and 35° outside and it starts raining, rattlesnakes will be out. They won’t go far, maybe a few feet to a nearby bush for a little while, but this phenomenon is very reliable. Keep this in mind when going out to get firewood or other activities in such an event.
Stacks of firewood are often used by snakes and other animals as overwinter homes. This can be largely avoided by simply moving the location of the stack each year.A Western Diamondback Rattlesnake using a stack of roofing tiles as a winter den.
Each day in July, 2023 has been above 110˚F with no end in sight. What do the rattlesnakes do?
A common misconception is that reptiles love the sun – the hotter, the better, right? Well, not quite. Like all reptiles, rattlesnakes are ectotherms and get their heat from the environment. But that doesn’t mean they don’t have limits. Just like you in the office when whats-his-name down the row keeps fiddling with the thermostat, rattlesnakes prefer specific temperatures. And more importantly, they can quickly die when they get too hot.
How hot is too hot for a rattlesnake? It depends. Generally, if the body temperature gets above 110˚ for even a little while, a rattlesnake will not survive. With ground temperatures hot enough to cook an egg, a rattlesnake caught out in the open for even a minute mid-day in Arizona will not survive. Aside from overheating, prolonged heat can kill off rattlesnakes by desiccation, literally drying out in the Arizona oven while the monsoon takes its sweet time getting here.
Where do rattlesnakes go when so hot?
Rattlesnakes hide away during the hottest and driest time of year in carefully selected retreats in a behavioral state known as aestivation. Think of it as hibernation to escape the heat instead of cold. Each year, rattlesnakes may use the same aestivation den, alongside other rattlesnakes of multiple species. And just like hibernation, these aestivation dens serve as social hubs, as well as survival escapes.
In the wild, these aestivation dens may be a cave in a drainage wall, a deep crevice in a rocky outcrop, packrat nests, or any number of other deep, thermally protected areas. But near developed areas, an even greater resource exists: backyards.
Openings to the foundation, cracks in the concrete leading under the deck, the shaded base pad under pool pump equipment, and more can be ideal aestivation dens for groups of rattlesnakes. Even better, almost all backyards provide easy sources of water. Combine all of this with dense, well-watered lantana or rosemary, and the perfect rattlesnake summer sanctuary is made.
If you find a rattlesnake in the yard right now, it’s possible it has been there awhile.
These Speckled Rattlesnakes are resting a short distance from their aestivation den and will retreat once the sun heats the area. This is a similar situation to aestivation dens found at homes, where homeowners may encounter them on the patio a short distance from the actual den.
“But it’s a dry heat”
Don’t be fooled by this favorite statement of visitors from wetter climates. We’re not talking about feeling sweaty and uncomfortable while you eat BBQ – dry heat kills.
Moisture loss is a significant danger to rattlesnakes when it’s so hot and dry outside. Simply breathing is dangerous, as every molecule of water lost from the body won’t be replaced until it falls from the sky. Any source of sustained water can and will attract rattlesnakes and other wildlife. If there is deep cover nearby to wait out the day until the next opportunity to drink, it makes an irresistible resource.
A group of rattlesnakes I found living under a leaky AC unit behind our home.
For homeowners, now is the time to review the property. Something as simple as a dripping hose or irrigation line that’s a bit too generous may be an oasis bringing venomous snakes to the yard. Eliminate any sources of water possible. View the property as critical habitat, and make careful decisions. If a rattlesnake is spotted few times a year near that over-watered natal plum, it’s time for some hard decisions about that plant.
What happens to rattlesnakes that are relocated when it’s so hot?
This statement doesn’t exactly make us popular, but it’s the truth. Do not call the fire department or the local security guard to relocate snakes, especially when it’s this hot. Even if the fact the snake will likely die isn’t reason enough, a potentially more dangerous situation can be the result. It doesn’t matter who: call a professional with deep snake knowledge. Here is why:
Homeowners are finding rattlesnakes in entryways or in a corner along the back patio and calling for relocation. The trick is, however, that these situations are usually not new. If a rattlesnake is in a yard right now, there are two scenarios that are most likely:
The rattlesnake has been aestivating on the property or immediately adjacent and is being discovered by chance after weeks of undetected behavior.
The rattlesnake was displaced by construction. Or, with increased frequency, botched relocation by the fire department or under-experienced relocator.
Rattlesnakes are often found in small groups aestivating in backyards. When we are called to catch one, we can usually locate the aestivation den, where we look to see if there are more. The homeowner is then educated on what is happening, and how the den can be addressed to prevent future, similar encounters. In these instances, the snake itself is not the issue, but a symptom of a provided resource. Usually, these can be fixed relatively easily.
Rattlesnake encounters in the summer that are due to construction of unexperienced relocation are a more complicated matter, unfortunately. While it is a great thing that there is an increased will out there to not kill rattlesnakes and have them relocated instead, the details matter greatly. If a rattlesnake is captured by the fire department and moved to a nearby bush or released to open ground, one of two things happen: the snake dies, or it panics and manages to escape to the nearest cover. This can be shade at the neighbors’ house, back to the original location, or any number of potentially dangerous situations. Rattlesnakes that are able to behave naturally can often coexist for a lifetime without conflict with humans by careful evasion, but all bets are off when they are forced into a cover-or-die situation.
We are currently seeing a lot of activity on our snake removal hotline. Rattlesnakes and other wildlife are having a tough time in this heat, forcing them to take desperate measures to survive. This increase of conflict is something that can be resolved by working with the natural behavior of the snake. This means that snakes that are captured for relocation must be released directly into a suitable replacement aestivation den. This also means that the individual relocating the snake needs to be able to identify aestivation microhabitat.
This Western Diamondback Rattlesnake was found by a snake relocator while searching for a suitable aestivation den to relocate a rattlesnake found at a home. This snake is a clue that the right release site is nearby. This careful release site selection is essential during the summer.
How to keep rattlesnakes out of the yard during the summer
The best way to keep snakes out of the yard during the hot, dry summer months is to reduce critical resources as much as possible. When it is this hot, rattlesnakes aren’t traveling around like they would be during the spring and fall, so the situations where they are found. This means rattlesnake encounters at homes are much more predictable and, therefore, avoidable.
Here are some things that can be done in a single weekend that can significantly reduce the chances of a summer rattlesnake den in the yard:
Do a sweep of the property for unnecessary water sources. This means fixing the leaky hose, cleaning up the outdoor dog bowl area, and checking on landscaping irrigation and drip lines to make sure they’re in good shape.
Watch areas of AC condenser run-off. You may be able to fix these situations by placing a metal can under them to prevent the ground from getting wet, and allow faster evaporation.
It’s time to get rid of those overgrown, over-watered lantana and rosemary bushes. They come standard with every home in Arizona, but consider native plants that require less water and are less likely to attract rattlesnakes and their prey.
Look into snake fencing as an option to physically prevent entry.
Find and fill any cracks and openings to the foundation of the home and other buildings. Any access to crawl spaces, flashing, under pavement and the driveway, or the foundation can become rattlesnake dens in the summer.
Carefully check seldom-visited sections of the yard: specifically pool pump areas and air conditioning units. These spots are usually hidden away and provide easy, private retreats for rattlesnakes and other animals.
Flood and destroy rodent burrows as they are found.
By this time, when rattlesnakes have already been at their summer retreats for several weeks, it’s more productive to prepare for what comes next: the monsoon activity, where encounters will be at the highest rate of the year.
What happens to rattlesnakes when the monsoon comes?
Once the monsoon rain comes, several events are kicked off.
First, the abundant ambient moisture and access to water relieve some of the survival pressure. Rattlesnakes will no longer be forced to hide away, meaning they can resume moving, hunting, and other activities. Rattlesnakes encountered in backyards will be less likely to be long-term residents. Aestivation dens are largely abandoned for the year for many species.
Often this is when rattlesnakes shed their skins, too. The moisture can start the shedding process, during which many rattlesnakes remain hidden away for a period of time, regardless of the nicer conditions outside. However, once they shed, they’re off to hunt and more.
Next, it’s time for babies! The moisture kicks off the birthing season. Rattlesnakes either birth in place, or move to special places where babies will be born, called rookeries. Depending on the species, the timing and location of this event varies. For Western Diamondback Rattlesnakes, which make up the bulk of rattlesnake encounters with homeowners, this can be about anywhere with adequate cover.
Questions and Answers about Summer Rattlesnake Activity:
Can I use a garden hose to move a rattlesnake away while it’s this hot?
You can, but it is likely a temporary solution. Rattlesnakes found in the yard right now are likely aestivating nearby, and will remain in the area until they can leave after the monsoon rain brings relief. Also, make sure the water isn’t too hot by spraying it to the side for a few seconds.
Are rattlesnakes more likely to be found indoors during this time?
Yes, but it’s still a very remote possibility. Even though indoors is obviously cooler, very few rattlesnake removal calls are inside homes during this time of year. The majority of rattlesnake in-home calls we respond to are due to doors being left open in the Spring and Fall, which is not an issue when it is above 110˚F outside.
Do rattlesnakes climb trees and shrubs to get away from the hot ground?
Rattlesnakes are often found up off the ground in bushes outside of their aestivation dens when it is this hot outside. A bit of airflow can help a snake keep cool, and they seem to take advantage of it.
How often do we find rattlesnakes that have died from the heat?
In our research of rattlesnakes living in urban islands, it is not uncommon to find rattlesnakes that have died during the hot and dry foresummer. This can be exacerbated by disturbance, such as stress from visitation or poorly performed relocation. An event as simple as a short delay from overnight location back to the den can mean death.
Am I attracting rattlesnakes if I provide water for generally preferable wildlife, such as rabbits and birds?
If this is being done in an area where rattlesnakes can occur: absolutely. Not only by providing water, but attracting prey animals as well. If there’s also an area the rattlesnakes can escape to during the day, it’s an ideal rattlesnake situation.
Where do wild rattlesnakes find water during the heat?
For the most part, they don’t. They are forced into a state of preservation, waiting for the monsoon rain to come. Others may find water at springs, rivers and streams, cattle tanks, and other sources of year-round water. But for many rattlesnakes, this simply isn’t an option.
Can excessive heat cause negatively affect the reproductive success of rattlesnakes?
Yes. Conditions of prolonged heat and drought are difficult to survive for any age of rattlesnake, with newborns being especially susceptible. In the summer of 2020, during a long period without rain and excessive heat, we observed that speckled rattlesnakes more often gave birth at aestivation dens rather than move to typical locations. This was mirrored in birthing events of Western Diamondback Rattlesnakes and others, giving birth in less-than-ideal situations. While these effects aren’t well documented, our observations and anecdotal experience with birthing in urban situations show, essentially: panic.
What do rattlesnakes do on hot ground or pavement when it’s this hot outside?
They die. This is why it is avoided at all costs, and it’s lethal to them when the fire department dumps them into a bush rather than relocate to a suitable area.
Are there any repellents that can be used to keep rattlesnakes from spending the summer in my cooler, wetter backyard?
Unfortunately there are no snake repellents on the market that will keep snakes of any species away, despite claims. The effective alternatives are a combination of habitat and resource reduction and, where applicable, snake fence installation.
Do rattlesnakes mate when it’s this hot?
Rattlesnakes can court and mate at any time of year, but typically the seasons for doing so are in the spring and fall, depending on species.
Is it ok to leave water our for rattlesnakes and other wildlife?
Yes it is! Just be sure that it is clean and does not become a disease vector. Also understand that doing so will indiscriminately invite wildlife to the area, and it’s not possible to pick and choose. Leaving water out for birds and bunnies is the same as doing so for rattlesnakes.
Are there specific scents or chemicals that can be applied to deter rattlesnakes?How about plants?
There are currently no products, operating either by scent or otherwise, that will effectively deter rattlesnakes and would be legally and ethically feasible.
The rumors about plants such as rosemary, lemongrass, mint, and other “snake-repellent” plants are just local mythology. Ironically, some of these, such as rosemary, provide deep ground cover that can actually attract rattlesnakes.
Does the application of lava rock, gravel or other small rocks deter rattlesnakes?
While these materials do not directly deter rattlesnakes, they may provide some protection in some areas simply by being hot ground cover. However, using these materials specifically for rattlesnake deterrent purposes would not be advisable. Remember that rattlesnakes live in very hot, rough environments. Using rocks, even sharp rocks like lava rock, would not have an effect.
How often do rattlesnakes need to drink?
If given an opportunity, they can drink every day. However, they are very efficient and many ways of preserving moisture through their behavior and physiology, and can go for several months without a drink if they must.
What can I do to help the rattlesnakes without causing unintended danger (to either them or me)?
This may seem like a non-answer, but simply having the attitude that rattlesnakes should be kept alive and are important wildlife is an important node contributing to changing culture. Perhaps the best thing someone can do, if they are aware of the potential risks associated and are able and willing to communicate as needed to visitors and others, is to simply leave the rattlesnakes in place.
At my own home, for example, we have discovered an aestivation den of Western Diamondback Rattlesnakes hiding out under the AC unit behind the house. It’s not in an area with immediate concern, but we know it’s there and make sure we behave appropriately. Rather than relocate these, we will allow them to stay there for the remainder of the aestivation period, then will likely repair the leaky AC drip that has caused the situation. We know there are several nearby and suitable aestivation sites in the immediate area, so loss of this one will not have negative consequences for these snakes.
If you are a member of any local buy/sell groups, you’ve likely seen this post out there. If you do, do not share it – it’s part of a scam to create viral posts in these easy to get into and usually poorly moderated groups.
Is this rattlesnake fake?
Not at all. It’s a real snake; an Ornate Blacktailed Rattlesnake (Crotalus ornatus) from the mountains of Texas where they are found. This one was photographed several years ago within its natural home range by a rattlesnake educator named Tim Cole.
Quick correction of BS associated with this scam trend:
Rattlesnakes are not increasing their range – in fact most species are losing ground quickly.
This rattlesnake is not an albino – it is a normal coloration and appearance for the species.
“Scientists don’t know everything” and similar comments: because it is a mystery to some does not mean this snake is a mystery to those who study them. If you just learned about the existence of this species from this scam post, consider that herpetologists are more knowledgeable than you are on the topic.
If you see this post:
Report it to Facebook as false information
Post this article into the comments so that others can be informed and stop spreading it.
This photograph been circulating in recent weeks – a Western Diamondback Rattlesnake coiled in a potted plant. It has, as these things tend to do, taken on a life of its own since then and the waft of BS is all over social media.
Is this photograph real?
Yes it is – it’s really nothing out of the ordinary. This is a Western Diamondback Rattlesnake from somewhere in the eastern end of its range (more than likely Texas). It’s sitting in a potted plant, which is both cool and humid, which anyone living outdoors right now is into.
What isn’t real?
The misinformation surrounding where this has been posted is inaccurate. It’s currently circulating around gardening groups, community pages, and anywhere that trolls and needy personalities find useful to scare people for attention. Western Diamondback Rattlesnakes do not live anywhere near Oregon, Idaho, Ohio, northern California, Florida, or many of the places it’s been claimed to originate. It’s also not from Arizona, as we have seen several claim already.
What is really interesting about this, but not too surprising:
The number of people who post this with false information who claim that it is their own photograph, and first-hand experience. To anyone tasked with unraveling the waves of bad information and personality disorders associated with rattlesnake misinformation, this is a normal phenomenon. Many who spread misinformation like this do so without knowing that it’s already been shared thousands of times at this point, so claims like “this morning in my garden”, often posted from locations where this could not possibly have happened, are extra silly.
Should I worry about this and stop gardening?
Absolutely not. Realize this is viral for a reason: it’s interesting, unusual (to most), and meant to get you excited, scared, worried, or whatever else you may be feeling. If anything at all, if you live in an area where rattlesnakes do occur, just take it as a reminder that rattlesnakes could be found in your garden at some point, and take the necessary precautions.
In the past few days, I’ve been to a multiple homes to catch rattlesnakes in garages. That’s normal and right on time. Which brings up the topic: when do rattlesnakes start moving again, and what should homeowners expect?
When will rattlesnakes come back? Our predictions, based on 11 years of relocation hotline activity:
Early February (you are here): Rattlesnakes will start to “stage”, or move closer to the entrance of, their winter dens. We will start to receive calls to remove small groups of rattlesnakes from garages, storage closets, sheds, and other out-of-the-way structures. Rattlesnake removal calls will frequently be multiple animals.
Late February: Rattlesnakes will start to appear out in the open near their selected dens. Garage removals will be more common. However, there will be an increase of calls to pool pumps, courtyards, and homes with rip rap and rock pile erosion control.
Early March: Snakes will start to make short movements from dens to hunt, drink, and engage in social behavior. They will be highly visible on the surface with peak activity occurring mid-morning before returning to the den or other nearby staging area. Mating activity is high, and multiple snake removal calls will be common.
Late March: Rattlesnake sightings will become common as they leave dens entirely. Peak activity will be between 3pm and 5pm.
April: Very high rattlesnake activity and sightings will be common. At this point they have entirely left the dens and sightings are more likely to be random encounters.
If you’re a hiker or outdoorsy type, you’re still not likely to see a rattlesnake in February. Be more watchful and aware in March, however.
Now is the best time to get to any maintenance or prevention activities you have on your to-do list. Landscaping, debris removal, fixing the snake fence, having the dog trained … get it done before the snakes show up.
Rattlesnakes often den in the garage. If you are using these last mild-weather days to get to “that” side of the garage, use extra caution.
Educating yourself is the best way to stay safe and feel better about the whole situation
As with most things, fear of rattlesnakes is mostly in our heads. Not the fear itself of course, that’s a real thing, but most of what we believe about rattlesnakes as a culture is simply false. Down to the idea that they are aggressive, or territorial (in the way that people use the word) and more, most of us just haven’t had an opportunity to learn factual information.
If you fear rattlesnakes, spend an afternoon going through these resources and watch what happens 🙂
Videos of early-spring rattlesnake captures and info:
More articles about making peace with rattlesnakes this spring:
The spring emergence of rattlesnakes is a big topic with homeowners and hikers – obviously we’ve discussed this in the past quite a lot! Here are some of those articles that can help make sense of it all.
Temperatures are dropping, and so is snake activity. Every year, we are asked this question and field hundreds of comments wanting to know when the rattlesnake-phobic can once again breathe a little easier.
Even more common, starting in September, people are surprised that snakes are still active. We get comments like “this late?” and “I thought they were hibernating?!”. The answer is of course a little more complicated, but the answer is easy to find.
When do snakes go away in the winter?
According to hotline activity as an indicator of snake activity, snake activity drops dramatically around the second week of November. While snakes can still be found on the surface here and there, this is effectively the end of “snake season”.
This question can be best answered by looking at the average activity on our relocation hotline. Since this is driven purely by chance encounters by homeowners and businesses, it’s a good indicator of how many snakes the general population could expect to not see snakes out there.
But I heard that snakes are active all year?
Yes they are, but to a much lower extent. You may be told that there is no such thing as “snake season” because rattlesnakes can be found any time of year. While it is certainly true that in the right conditions a snake might make an appearance, it’s not necessarily useful for this discussion.
If a snake is found at your home in the winter, it has likely been there for awhile.
Here’s a better, more detailed article about When snakes “go to sleep” for the winter”:
A rattlesnake in the backyard is one thing … but how about in the house, in the bedroom, and even under the bed? It happens, though, thankfully very rarely.
The thing is: rattlesnakes don’t want to be in your home. There are species of snakes that get in often, daily even, like Nightsakes and baby Longnosed snakes. Rattlesnakes, on the otherhand, for one reason or another just don’t make an effort to come inside. If I were to assume, based on how rattlesnakes handle stress and modify their behavior accordingly, the activity inside a home makes them less than ideal hiding spots.
This rattlesnake was found inside a home; a rare event.
How often does a rattlesnake get inside?
Fortunately, Rattlesnake Solutions has a very large collection of human-conflict data of this sort from over ten thousand individual encounters. It happens, but not very often.
Of all encounters we’ve documented, fewer than 100 were rattlesnakes inside the home. If you remove homes that were previously abandoned, missing entire walls, or in a condition where they should be condemned … you end up with fewer than 40. That puts the chances of a rattlesnake encounter in your home, based on snake removal records, at 0.4%. That puts it into a solid “don’t worry about it and go on with your day” category.
Most of the time, a call to catch a rattlesnake inside a home ends up with a Desert Nightsnake in our bucket. These little guys look quite a bit like a rattlesnake and are often mistaken for them.
Not a rattlesnake.
How does a rattlesnake get into the house?
Fortunately, rattlesnakes are easy to keep out of the house. They come in the same way we do – right through the front door. Most of the time, a rattlesnake inside a house, and in fact a good portion of the other types of snakes as well, come in through a door left open.
Who leaves the door open in Arizona? Everyone, it seems, on the right cool day. Especially our midwestern friends, where it seems an open backdoor on a breezy spring day is a normal thing, tend to leave that sliding door open a bit during prime rattlesnake activity time.
On other relocation calls where we’ve captured rattlesnakes inside the home, the situation is often similar. A home with a wall partially removed during construction, a partially-completed vent removal allowing access, large gaps under garage doors or patio doors, etc. Simply, if there is access to inside the home, animals may find their way in.
What’s going on with this photo of the rattlesnake under a bed?
This photo was from an apartment complex in the North Phoenix, Cave Creek area. Mitch ran out to capture it. Upon arriving, he assumed it would be another nightsnake (which it often is) and had to run back out to the car to get his tongs and bucket after seeing this.
Not a nightsnake!
He was able to quickly and safely capture it. But how and why was it in there? And does the resident need to worry about more of them?
As we described earlier, it turns out that the resident left the home for less than 5 minutes, leaving the door slightly ajar. That’s all the time it takes for a wandering rattlesnake to find the cool, air conditioned “cave”, and slip inside.
This also does not mean there are others. Rattlesnakes, while being quite social in a variety of situations, are most often found at homes alone. They do not, as a popular myth goes, travel in pairs.
This also does not indicate that there are more rattlesnake encounters in the Cave Creek area … that is just true, regardless of this particular encounter.
How to keep rattlesnakes out of the house?
The best way to keep rattlesnakes out of your home is to keep doors closed and eliminate access, down to a 1/4″ space.
Sometimes that can be tricky, however. Something we have seen with homes in the valley is an issue with how cabinets are put together. This seems to be the reason behind a majority of nightsnake visits, and at least a few rattlesnakes.
If you look under the sink in your kitchen or bathroom, you’ll most likely see the pipes disappearing into the wall in an orderly, well-sealed way. Behind the cabinets, though, is a different story. The pipes coming into the home may be unsealed. That means if there are any gaps under the cabinet overhang (there most often are), there’s a direct highway from under the home to your bedroom bathroom. This may also be the cause for your scorpion and rodent issues.
The easy fix? Seal the gaps under the cabinet overhang. You could go through the trouble to pull out the whole cabinet, but without knowing for sure there’s a problem to begin with, that’s probably overkill. A Saturday afternoon with some expanding foam is all you likely need.
This small Western Diamondback Rattlesnake was in a kitchen under the cabinets
The other thing you should do is to take steps to reduce the overall number of rattlesnakes visiting your property. That is best done by a combination of property modification (landscaping, etc., here’s our step-by-step guide) and physical barriers, like properly sealed garage doors and rattlesnake fence installation.
So rest easy. While a rattlesnake inside the home is something that does happen from time to time, it’s nothing to be overly concerned with. No need to call the realtor or burn the house down; just keep the door closed and you’ll be just fine.
Better late than never – rattlesnakes are giving birth, even without the rain. One of the services we offer are serial property inspections, to continuously monitor properties to evaluate possible rattlesnake activity and provide recommendations to landscapers, pest control, and property managers.
We have been inspecting this particular property for many years, and this is the most interesting thing found there to date.
On the previous inspection, Greyson noted a shed skin in an area at the edge of the property. Knowing a fresh shed during this hot and dry period could indicate an estivation den nearby, he focused on that spot during his visit yesterday, and, whoa.
This mother rattlesnake gave birth to babies after being captured at a home in Phoenix.
Here is what was found: a late-season estivation den with a mixed bag of Western Diamondback Rattlesnakes, with one having given birth in the recent past, and another in a deep blue phase (preparing to shed skin)
While this is not entirely unusual, what is different about this year is that we are seeing that rattlesnakes are having their babies later than usual, and they are doing so in their estivation dens instead of moving to their usually-preferred birthing spots.
This is likely a response to our exceptionally hot (the hottest on record) summer and near-complete lack of rain. This is similar to a recent visit to a home by Dave in Tucson (I’ll be posting this shortly as well) where he captured a total of 14 rattlesnakes.
Are rattlesnakes giving birth later this year than normal?
According to our observations and activity on the relocation hotline: yes, it appears that rattlesnakes are having babies later this year than usual. In a normal year, we start to receive our first calls to capture groups of mother Western Diamondback Rattlesnakes with their newborn babies in early July, usually hitting its peak around the first week of August, then trickling in here or there until around the first week of September. This year, it took much longer for this to be normal, only now (mid-August) has it become routine.
Rattlesnakes give live birth and hang out with the babies for a period of time afterward.
Likewise, rattlesnakes seen in informal surveys and in our study of rattlesnakes in the Phoenix Mountain Preserve have shown that Western Diamondback Rattlesnake and Tiger Rattlesnakes that would have likely given birth by now are still languishing in a gravid (pregnant) state at estivation dens.
While this is in no way a full representation of what’s happening out there, but does represent 10 years of data collection and informal survey observations. It should also be noted that while this is the case in the Phoenix and Tucson areas, it is unlikely to represent behavior in other regions.
Why are baby rattlesnakes being born later this year than usual?
This year makes that a little bit tougher than normal. If monsoon rain triggers pregnant rattlesnakes to give birth, what happens when there is no rain at all?
They have to give birth eventually … so what we are seeing is this: The mother rattlesnakes are staying at estivation sites (spots selected to hide away during the hottest summer months) far longer than they normally would. Rather than moving to a birthing site as they normally would, they are having their babies right in place.
This likely isn’t good for the babies, ultimately and unfortunately. They lose moisture more than twice as quickly as adults (J. Agugliaro, H. Reinert 2005). Unless we get some rain soon, that could be big trouble for this year’s babies. We’re hoping for the best, but looking at the forecast … hoping is all there is to do.
How homeowners can keep baby rattlesnakes out of the yard
Keeping the smallest rattlesnakes out of your area is a bit different than the larger ones.
First, the space they need to get in is much smaller … anything more than about a third of an inch can allow access. Second, they make frequent movements and may not necessarily know where they’re going. Unlike adults, who’ve had a lifetime to map out a homerange, babies may show up any place, any time. For that reason, physical barriers are the best bet. Rather than go too far into detail here, I’ll refer you to our guide to keep baby rattlesnakes out of the yard.
References
Schuett, G.W., Repp, R.A., Hoss, S.K. and Herrmann, H.‐W. (2013), Parturition in a Desert Rattlesnake. Biol J Linn Soc Lond, 110: 866-877. doi:10.1111/bij.12166
Agugliaro J, Reinert HK. Comparative skin permeability of neonatal and adult timber rattlesnakes (Crotalus horridus). Comp Biochem Physiol A Mol Integr Physiol. 2005;141(1):70-75. doi:10.1016/j.cbpb.2005.04.002
