"I love them. They're just such a cool little lizard that most people don't even know are here," Cale Morris, venom manager at the Phoenix Herpetological Sanctuary and a chuckwalla enthusiast ...

For this lizard, bright colour is a courtship tactic. During mating season, the skin of the males turns red, blue, green and yellow. Between three and seven centimetres long, they are normally a sandy ...

The International Union for Conservation of Nature assessed the blue tree monitor lizard as endangered in 2017, finding that the animals face a very high risk of extinction in the wild. The species is ...