bluetails

Bluetails are lizards of the skink family, named for the vivid blue coloring on their tails—most striking in juveniles, fading as they mature.

The bright tail serves as a defense mechanism, drawing predators' attention away from vital organs; the tail can detach and continue wriggling while the lizard escapes.

Common in North America, they're often seen basking on rocks or logs: We spotted a bluetail darting across the patio.