There are several animals that perform push-ups as a show of strength, the establishment of territory, and to attract a mate. ...We're talking about lizards, of course. Several lizard species in Zion can be seen performing these "push-up" displays, elevating the head and upper body in vigorous up-and-down motions. The desert spiny lizard, seen here, is one of the largest and most common species at Zion to engage in this behavior. The body language is often used as a threatening gesture to drive