Bufo alvarius (Colorado River Toad, Sonoran Desert Toad).
This is the legendary, rare and powerfully mysterious Sonoran Desert Toad. This venomous toad finds its home in the Sonoran desert of the Southwestern United States and Northern Mexico.
Bufo alvarius is nocturnal and escapes the tremendous desert heat by remaining underground, emerging at night to congregate in wet areas near streams and lakes and irrigated fields.
The Sonoran Desert Toad is the largest North American toad, attaining a body length of up to 7 inches. They are smooth and leathery in appearance. Brown to olive green in color with a white underside. Bufo alvarius live approximately 15 years.