Rio Grande Leopard frogs also known as Rana berlandieri, are amphibians that range from 5.7 to 11.4 cm long. They can be brown, green, grey, or brown, or even a combination. They have dark brown spots which are surrounded by a tan line. These spots vary in size and can sometimes be absent. The frogs can range from 2.2 inches to 4.5 inches. Male frogs have large flaps underneath the skin below their mouth, and females have smaller ones. Male frogs also tend to be larger. Rio Grande frogs are found from central and western Texas all the way to New Mexico and Veracruz, Mexico. They are found in arid regions and near water sources such as rivers, streams, brooks, and ponds.