The four different “Frog” stamps are offered in a booklet of 20 the Pacific tree frog, the northern leopard frog, the American green tree frog, and the squirrel tree frog.

More than 4,000 species of frogs are found in all continents except Antarctica, and more than 90 species are found here in the United States. Frogs play an important role not only in their natural habitat, but in our daily lives. As tadpoles, they feed on algae, which helps keep the water clean; as adults, they feed on insects, which helps to control bug populations.

Growing to an adult size of between two and five inches in length, the northern leopard frog (Rana pipiens, upper right) can be found across the northern United States and as far south as New Mexico. Varying in color from green to tan with a light underbelly and light borders that sometimes appear around its spots, this frog is most commonly identified by its highly distinctive call, a rattle-like snoring noise that can last three seconds or longer, followed by several notes described as “chuckling” or “clucking.”Growing to an adult size of between two and five inches in length, the northern leopard frog (Rana pipiens, upper right) can be found across the northern United States and as far south as New Mexico. Varying in color from green to tan with a light underbelly and light borders that sometimes appear around its spots, this frog is most commonly identified by its highly distinctive call, a rattle-like snoring noise that can last three seconds or longer, followed by several notes described as “chuckling” or “clucking.”