Found this out today at USPS. Issued 7/9/19. Hope others also know.
https://about.usps.com/newsroom/national-releases/2019/0709-usps-celebrates-four-species-of-frogs.htm
FOREVER stamps. Thank you all.
BOISE, ID — The U.S. Postal Service today issued new Forever stamps featuring digital illustrations of four North American frogs. The First Day of Issue event took place at the Morrison Knudsen Nature Center, Boise, ID. The four different “Frog” stamps are offered in a booklet of 20 and feature: the Pacific tree frog, the northern leopard frog, the American green tree frog and the squirrel tree frog. News of the stamp is being shared using the hashtags #FrogStamps.
“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,” said Tom Samra, Vice President, Facilities, U.S. Postal Service and dedicating official at the stamp ceremony. “Frogs play an important role, not only in their natural habitat, but to our daily lives. As tadpoles they feed on algae, which helps keep the water clean, and as adults, they feed on insects, which helps to control bug populations.”