<p>This listing is for the Frogs Pane of 20 Forever postage stamps </p><p> Numbering more than 4,000 species, frogs live on every continent except Antarctica. Of those thousands, more than 90 species are found in the United States. </p><p> Digital illustrations of four North American frogs grace these new stamps: the Pacific tree frog, the northern leopard frog, the American green tree frog, and the squirrel tree frog. Working with a primarily green color palette, the artist captured the essence of each animal with enough important defining features to make each recognizable. </p><p> Frogs stamp is being issued as a Forever postage stamp. This stamp will always be equal in value to the current one-ounce First-Class postage rate. </p>