Many lizards have the ability to lose their tail to escape from predators, the lizards then have the ability to regenerate cartilage tails. In some cases, as in this lizard I found while cleaning up some debris in our field, the tail is also vibrantly colored to attract predators (better to get nipped in the butt than the face). Not only does the tail detach, but it also has the ability to wriggle around for a long time, distracting the predator, while the lizard has a chance to get away. I think I got too close to this lizard and spooked the poor thing.
hugs 4 bugs,