to over 10,000 feet, they are found in shades of greens or browns and even have been known to change between them. They live in many types of habitats and reproduce in aquatic settings. This species is also known as the Pacific chorus frog. In Montana, the frog is common east of the continental divide. Plains spadefoot toad The plains spadefoot toad (Spea bombifrons) is a species of American spadefoot toad which ranges from southwestern Canada, throughout the Great Plains of the western United States, and into northern Mexico. Like other species of spadefoot toad, they get their name from a spade-like projection on their hind legs which allows them to dig into sandy soils. The plains spadefoot toad generally grows from 1.5 to 2.5 inches in length, has a round body, with relatively short legs. They vary in color from grays to browns, usually reflecting the color of the soil in their native habitat, with a white underside. Sometimes they have light striping on their back. In Montana, this toad is found in the eastern plains, east of the continental divide. Rocky Mountain tailed frog The tailed frogs are two species of frogs. The species are part of the genus Ascaphus, the only taxon in the family Ascaphidae . The "tail" in the name is actually an extension of the male cloaca. The tail is one of two distinctive anatomical features adapting the species to life in fast-flowing streams. It is the only North American frog that reproduces by internal fertilization. The Rocky Mountain tailed frog (Ascaphus montanus) is found along cold mountain streams in Western Montana. Western toad The western toad or boreal toad (Bufo boreas, Salish: snakʷkʷaneʔ) is a large toad species, between 5.6 and 13 cm long, of western North America. It has a white or cream dorsal stripe, and is dusky gray or greenish dorsally with skin glands concentrated within the dark blotches. In Montana, this toad occurs in the western portion of the state. Woodhouse's toad The Woodhouse's toad, (Bufo woodhousii) is a medium-sized () true toad, which is native to the United States and Mexico. There are two recognized subspecies. The epithet woodhousii is in honor of the American physician and naturalist Samuel Washington Woodhouse. B. woodhousii tends to hybridize with Bufo americanus in their overlapping ranges. In Montana, this toad is found in the eastern half of the state. Great Plains toad