The Cactus wren (Campylorhynchus brunneicapillus) is named because it frequents desert cactus plants such as the saguaro and cholla. By using cholla and saguaro cacti as nesting sites, the Cactus Wren benefits from spiky protection from potential nest predators, particularly snakes. The wren's bulky, football-shaped nest provides additional protection, with a narrow, tube-like side entrance that limits access to the nest chamber. After breeding, the cactus wren may still roost in it. The state bird of Arizona, and the largest wren in the United States, its plumage is brown, with black and white spots as markings.