Tiger salamanders, boreal chorus frogs, leopard frogs, and plains spadefoot toads represent the amphibians. The American spadefoot toads are of typical shape to most fossorial (or burrowing) frogs. The banded newt, the eastern spadefoot toad, and the Hula painted frog are critically endangered. The ferns, moss and leaf cover there shelter salamanders and spadefoot toads. Resident spadefoot toads include the New Mexico, plains, and Couch's varieties. The American spadefoot toads are terrestrial when not underground. Like all species of spadefoot toad, the New Mexico spadefoot toad is nocturnal and secretive. American spadefoot toads have a unique diet. The two main species of spadefoot toads are found in different locations across North America. The spadefoot toads of North America are also adapted to underground life. The Scaphiopodidae are a family of American spadefoot toads, which are native to North America. In 2014, a population of plains spadefoot toad was found in the park. The spadefoot toads ("Scaphiopus spp.") of North America fall into this category. There, he discovered the species that were known as Couch's kingbird and Couch's spadefoot toad. The Great Basin spadefoot ("Spea intermontana") is a species of toad in the family Scaphiopodidae.