I’ve been watching this old Arizona Black Rattlesnake for more than 10 years now, each year returning to the same location to hunt for small animals looking to get a drink at an isolated water hole. The rock wall built by ranchers long ago serves as perfect daytime refugia.
A group of Western Diamondback Rattlesnakes aestivating during the lethal Arizona summer heat in the summer of 2016. In this cave, they can stay consistently cooler than the 115˚F+ daily temperatures outside and survive until monsoon rain brings relief.
Blacktailed Rattlesnake showing off the “desert phase” phenotype, typical of lower, hot desert regions where this snake is common in rocky hills and mountains. This chaotic pattern can range from a yellow-green to silver, at times with the pattern degrading to the point of a unicolor appearance. This one is typical for mountains west of Phoenix.
Arizona Black Rattlesnake from a desert population. Many of the snakes here are all black, missing the white or yellow scales that are typical in the more often photographed locations. This one has just a hint of yellow in some dorsal scales, but is otherwise all black or grey, including the belly.
A Western Diamondback Rattlesnake on a hot night time survey of a county park. Thermal cameras show snakes selecting the coolest surfaces in the area to rest in and against – there is possibly more to this, which we are looking into.
An Arizona Black Rattlesnake in ambush in the first sun of the day. The flat rock is on the only, narrow path to a natural water hole – the only water in the region. Any small mammal wanting to visit it would have to jump across this rock. This is likely something this snake knows very well by now, an example of how much can go into the selection of a hunting position. If I may anthropomorphize a bit, I’d call it strategic.
This Western Diamondback Rattlesnake was aestivating on a cool, extremely dry May morning. This drainage used to be rich with life, but recent fires fueled by invasive grasses have changed it into a charred, open oven. A few animals remain – the most abundant life to spring up after the event: globe chamomile. Hopefully this snake found a way to survive.
A Western Diamondback Rattlesnake cruising along a dry wash on a hot summer evening. Nearby water means a higher number of rattlesnakes in the area, and they can be found each evening moving to and from the spring. Not only good for a drink; these situations are ideal hunting opportunities for prey who also need it.
Banded Sandsnakes are common, found in sandy drainages and often spotted on the surface in the summer. They’re often mistaken for superficially similar groundsnakes and shovelnosed snakes – one way to tell them apart is the relatively wide body, and the gradual transition of the dorsal stripe to the tan base color along its back. They also have kind of silly puppy faces, which can’t be unseen once you do. This one was found near our office in Cave Creek.
Sonoran Sidewinder in the soft sand it prefers, moving along the edge of drainage when spotted.
