This is a beautiful stamp souvenir sheet, issued by Burundi in 2012 as part of the Nature Protection Series, depicting butterflies on the IUCN Red List of Threatened Species. The butterflies shown are the Euthalia dirtea, Drupadia estella, Precis octavia, and a Diaethria eluina. The sheet is Scott catalog #1145, and is Post Office fresh, mint never hinged, and F/VF.