What animal changes color on a cloudy day?

Euphorbia, bowlegged spider, chameleon, etc. These animals, such as Euphorbia, Spider with Bow Foot and Chameleon, will change their colors with the change of surrounding environment and weather, so when the cloudy day and environment change, Euphorbia, Spider with Bow Foot and Chameleon will change their colors to protect themselves. The discoloration of animals adapts to different environments through pigments and pigment cells in the skin, and natural enemies can be avoided by adjusting colors.