Speckled Rattlesnakes are often seen by hikers in Phoenix, who can be surprised that wildlife can be found even on hiking trails in the middle of the city. If you’ve ever hiked Camelback, you’ve likely walked right past at least one of these beautiful pink animals. They’re very cryptic though, so not many people will ever know.
An orange Southwestern Speckled Rattlesnake making good on its name. While its bands are still visible, the chaotic distribution of colors can make this animal very difficult to see in context. This one lives near quite a few people with hundreds hiking right past it every weekend, but bites nobody.
Southwestern Speckled Rattlesnake
(Crotalus pyrrhus)https://rattlesnakesolutions.com/SpeckledRattlesnake
Despite being incredibly easy to observe in surrounding mountain ranges, the Southwestern Speckled Rattlesnakes in the Sierra Estrella just southwest of Phoenix are harder to spot. They’re likely just as common, but the steep terrain and majority of prime geology for the species being inaccessible reservation land make it a challenge to see one. Kris Haas spotted this pretty one way up mountain.
A Southwestern Speckled Rattlesnake resting outside its aestivation den, which it shares with several others to wait out the hottest, driest time of summer.
A Southwestern Speckled Rattlesnake hiding from the sun near the entrance of a shallow cave in south Phoenix. During the springtime, this species can be found even relatively far from its rocky habitat, hunting birds and lizards at the base of creosote. This caliche cave, which is also the occasional home to a Sonoran Desert Tortoise or two, is about as far from its winter and summer preferred homes as it will get in the year, nearly a quarter mile from the nearest sizable rock.
The blue-grey eyes of a Southwestern Speckled Rattlesnake stand out against its red and grey body. This is a typical look for the species as they are found in rocky areas of central Phoenix. This snake carries a small passive radio transmitter that helps us learn about its life in an urban park.
A pregnant Southwestern Speckled Rattlesnake out on a wet morning, coiled to maximize rain capture. A surprise rain got about every rattlesnake in the area on the surface for the day, in various forms of this pose. Hydrophobic scales help collect drops of rain, which the snake can then drink directly from its skin, as she is doing here.
A rattlesnake that looks like a rock. This Southwestern Speckled Rattlesnake was found in central Arizona in an area of rusty granite and quartz. The resulting cryptic pattern is just as colorful, including speckled grey blue eyes. Though it is brightly colored, these snakes can be very difficult to see in context.
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Crowell, H. L., Whelan, J. M., & Harmel, M. V. (2020). Rattlesnake colouration affects detection by predators. Journal of Zoology, 310(1), 1–11. https://doi.org/10.1111/jzo.12786
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Hanscom, R. J. (2025). From ambush to activity: Using accelerometry to reveal cryptic behaviors of rattlesnakes and kangaroo rats [Doctoral dissertation, University of California, Riverside]. eScholarship. https://escholarship.org/content/qt4ft2985w/qt4ft2985w.pdf
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A Southwestern Speckled Rattlesnake in ambush on a humid night a couple of years back. Like many other desert reptiles, the monsoon and period after are the most active times of year. Humid air and cooler, stable temperatures make for safer activity, and a lot has to be done in a relatively short amount of time.
Southwestern Speckled Rattlesnake (Crotalus pyrrhus)
A Southwestern Speckled Rattlesnake hanging out in the shade on a blistering hot morning several years ago. This snake is still using this spot in the summer, staying cooler during the day and emerging at night, staying very near.
This is why, when we are called to capture a snake at a home during peak summer, we search for others. Especially without rain, they’re tethered to aestivation sites, never going far. If a rattlesnake is found on the back patio right now, there are only a few possibilities. It was either displaced by construction, tossed over the fence by the fire department, or it has been there for several weeks, successfully hiding as it always has before being discovered.
