U.S. #UX278a Mint Endangered Species

U.S. #UX278a Mint -Endangered Species - Booklet with complete set of 15 Postal Cards (#264-278)

Featured on the cards are the Black-footed ferret, Schaus swallowtail butterfly, Brown pelican, San Francisco garter snake, Ocelot, Gila trout, Hawaiian monk seal, Thick-bille parrot, California condor, Wyoming toad, Woodland caribou, Florida manatee, Piping plover, Florida panther, and American crocodile.