What lives underground and hisses to fend off predators? If you were thinking of a snake, then the burrowing owl succeeded in its goal (and our picture above must not have loaded...)! Sharing semi-arid climates with squirrels, rattlesnakes, and more has led this unique bird to develop some interesting adaptations, including that particular defense mechanism. Life on ground-level is no easy endeavor for these little ones, and burrowing owl populations have declined dramatically. However, recent captive breeding programs in the Santa Clara Valley are offering hope.