Colorado River Toad
This nocturnal frog can be found from arid grasslands to oak and sycamore groves in mountain canyons. It sometimes takes refuge in rodent burrows and is an active forager, feeding on invertebrates, lizards, small mammals, and amphibians. To avoid becoming prey itself, it secretes a poison potent enough to paralyze a full grown dog.
Listed as a species of Least Concern by IUCN Red List
Mexico, southern areas of United States