This is a beautiful souvenir sheet consisting of one stamp, issued by Guinea-Bissau in 2008, featuring a variety of hippos and birds. Included on the stamp are the Hippopotamus and the Northern Pintail. Included in the margins are the Hippopotamus and the White-Faced Whistling Duck, along with brief written descriptions of the animals. Also featured on the sheet are the minerals Vanadinite and Malachite. The sheet is Michel catalog #3840/ Bl. 651, and is Post Office fresh, mint never hinged.