Scientists have discovered evidence for complex cooperative behavior in side-blotched lizards. Side-blotched lizards have three different color variations for their throat patch, orange, blue, and yellow. Scientists have shown that the behavior pattern of a side-blotched lizard can be predicted by the color of its throat patch. Lizards with orange throat patches tend to be agressive, those with blue throat patches tend to be cooperative, and lizards with yellow throat patches are crafty. Through cooperation, the color variations in the lizards are maintained.

Find out more: Cooperation Keeps Lizards' Blue Genes from Fading (National Science Foundation)