American Bullfrog
Lithobates catesbeianus
Photo by Allan Ostling at the Desert Botanical Garden, Phoenix, Maricopa Co., Arizona, June 2016.
Populations of American Bullfrogs in the Sonoran Desert have been drastically reduced over the past 30 years. The reason is that they can disrupt the breeding and survival of native frogs. That is, the bullfrog is an invasive species after having been released here many decades ago.