Four of them live in Colorado: snowshoe hares, white-tailed ptarmigan, short-tailed weasels and long-tailed weasels.

We all know what chameleons are capable of: changing into a variety of colors to match their surroundings. They're one of the animals that are so well camouflaged you'd never see them right in front ...

Migration, hibernation and food storage are all responses to seasonal changes. As the days become shorter and the nights get longer, hormone changes trigger an animal's instinct to prepare for winter.

Color change in animals is a response shaped by evolution. Each species has developed its own method and reason for this ability, like an overreliance on light or temperature cues, or a physiological ...

For the first time ever, marine biologists have measured how much energy octopuses really need to change color — and it's a lot. When you purchase through links on our site, we may earn an affiliate ...