Chameleons

Chameleons have it easy. If they need to hide from a predator they just change their appearance, and disappear against whatever they happen to be standing on. [Surrounded:Covered] by leaves? Turn green. Tree trunk? Brown it is.But Aegean wall lizards have a different strategy. They live on the Greek Islands. And instead of changing their appearance, they find a safer spot. That is, they're really good at picking out just the right [background:feature] to [minimize:add] the chances that they'll be spotted by a hungry crow or raptor.That's according to a new study in the journal Scientific Reports.Birds can perceive both visible and [ultraviolet:bright] light, so researchers snapped regular and UV photos of lizards basking on rocks to figure out how the lizards look to birds. The scientists discovered that the lizards' [camouflage:womb] is precisely tuned to avian eyeballs, helping them seem to disappear. Lizards with darker backs hang out on darker rocks. Lighter ones choose lighter rocks.