Petrified Forest National Park, Navajo, Apache, Arizona, United States

More than 16 kinds of lizards and snakes live in various habitats in the park and consume large quantities of insects, spiders, scorpions, other reptiles, and small mammals. The collared lizard, which occurs in every habitat, is the largest and most often seen.
Plateau striped whiptails, a species consisting entirely of females, prefer grasslands and developed areas. Side-blotched lizards live in rocky areas of the park but are seldom seen. Gopher snakes, which sometimes imitate rattlesnakes when disturbed, are among the most common snakes in the park. The Western rattlesnake, the only venomous snake found in the park, prefers grasslands and shrub areas.
Seven kinds of amphibians, which drink no water but absorb it through their permeable skins, have been identified in Petrified Forest National Park. tiger salamanders, found in grassland and near major drainages, are the only salamander species known in Arizona. Woodhouse’s toads, which are seldom seen, are the largest toads in the park. They like grasslands, riparian corridors, and developed areas. Red-spotted toads, most active in the rainy season, July through September, are found in rocky areas near streams and in canyons. The Great Plains toad, the most common toad in the park, prefers grasslands. Resident spadefoot toads include the New Mexico, plains, and Couch's varieties.
A survey conducted in 2006 identified 216 species of birds known to have occurred in Petrified Forest National Park since the park became a protected area in 1906. Of those, 33 species breed within the park, 6 other species probably do, and 18 species live in the park year-round. Thirty-five species live in the park only during the summer and 11 species only during the winter. The greatest diversity of birds occurs during fall and winter migrations.