The Pickerel frog ranges from the Canadian Maritime Provinces south to the Carolinas and then west to southeast Minnesota and eastern Texas. However, the Pickerel frog has chocolate-brown spots arranged in two rows between the dorsolateral folds while the Leopard frog's spots are more irregular and scattered. They can be distinguished by the bright yellow or yellow-orange color on the inside concealed surface of the thigh.
Leopard frogs are white in the same area.
These frogs range in size from 45 to 75 millimeters as adults. Females are usually larger than males. Male Pickerel frogs have paired vocal sacs, stout forearms and swollen thumbs. These frogs produce toxic skin secretions that are irritating to humans but can be fatal to other small animals, especially other amphibians. These frogs are carnivorous and their diet consists mostly of small insects and other invertebrates.