Is It Possible That Fence Lizards Are Using Rocks to Stay Cool When It Gets Hot?

Fence lizard populations winking out in hottest deserts of the american southwest. Lizards use sun to thermo regulate, so they can cool down when they need to. As climate has warmed, lizards have responded by doing what they have always on hot days: spending more and more time in the shade. The longer you are hiding under a rock to stay cool, the less time you have to go out and forage for food. If that happened, if they crossed that line during the day, then they weren't getting enough food,. They weren't able to overtime build up the energy reserves in their bodies to reproduce.