Should I expect reptiles in Southwest USA deserts in winter?
I'm aware there is a huge generalization which will have a lot of exceptions both in species as in microclimates, I'm looking for a general answer, yet specific for the region and time of year.
I'm aware that there are many reptile species which inhabit the deserts in the south west of the United States (California, Nevada, Arizona, Utah, New Mexico). During winter, do most of these reptiles go in some sort of hibernation, or can some/many still be found and seen during the day where there is some sun?
(any tips to find em/watch out for are also welcome. Not so much to avoid them, but to observe them)
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Based on travelling in the region of this question for a few weeks and asking numerous park rangers this questions, and yet activly trying to find reptiles. Most snakes and other reptiles are indeed in hibernation in this period. Due to the cold most hibernate too deep to awake during the day.
On south oriented slopes that warm up pretty good some lizards may be found, but rarely numerous or many different species.
An exception to this region appears to be the west of california, which even in winter remains quite warm, and low land pools that do not freeze (turtles).
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Adding to what Don Branson said, Try not to dismantle or peep into a pile of stones, small cracks.
With reference to :"During winter, do most of these reptiles go in some sort of hibernation, or can some/many still be found and seen during the day where there is some sun?"
What I've observed is, It is most likely that you may come across a snake/serpent during the early hours of day. They do get out around their hibernation place for Basking. And when irritated during Basking times in winters, they are slightly more aggressive than usual conditions.
Apart from this, during bright day light, they tend to stay out of trouble. So I believe you need to be more careful during the early hours of day i.e 2-5 hours after the sunrise.
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To add to what others have mentioned, reptiles do indeed go into hibernation, but not in the thought of "traditional" hibernation, such as that of a bear or other mammals. Reptiles usually do burrow down, but they can certainly be awoken. Here in the southeast, if the temperatures rise just a bit, we have plenty of snakes and lizards around sunning themselves. Reptiles usually take advantage of warm days to drink water and hunt before hunkering back down.
Bear in mind that many reptiles feel particularly vulnerable during this time out since they are likely weak from having little food, so they may be more inclined to be cranky. That being said, there are very few (if any) reptiles that seek out to attack humans so you should be fine as long as you give them a wide berth.
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