This is a beautiful souvenir sheet, issued by Guinea in 2009, commemorating the 200th anniversary of the birth of famous English naturalist Charles Darwin. Featured are the Cocos Island Finch, Lady's Slipper Orchid flowers, the Mangrove Finch bird, White-Fronted Capuchin New World primate, the Olive Baboon, and a brief written biography of Royal Medal-winning Darwin. The sheet is Michel catalog 6593/Bl.1688, and is Post Office fresh, mint never hinged, and F/VF.