Issued by the African country of Burundi in 2011, this souvenir sheet of four postage stamps depicits four African primates (including apes, baboons, and a monkeys).
More specifically, the animals depicted on these postage stamps are the mandrill (Mandrillus sphinx), the endangered Tana River mangabey (Cercocebus galeritus), hamadryas baboon (Papio hamadryas), and the gelada baboon (Theropithecus gelada).
These collectible stamps are in good condition and are CTO (Cancelled-to-order).
