Not too sunny, not too shady, just right for Japanese macaques

As climate change alters the temperatures of animal habitats, it seems natural that endotherms, warm-blooded animals, would prefer to hang out in the shade during hot weather. The use of microhabitats in the sun and shade is an important thermoregulatory behavior that has been reported across a wide range of animal species, and researchers are becoming increasingly interested in how animals—especially those with long lifespans—flexibly cope with thermal stress.