This is a beautiful sheet of 4 stamps, issued by Uganda in 2012, featuring some of the rare species of butterflies found in the Albertine Rift region of Africa. Included are the African butterflies Silver barred Charaxes, Acraea Swordtail, Green Banded Swallowtail, and Crossley's forest queen. The sheet is Yvert & Tellier catalog #2321-4, and is Post Office fresh, mint never hinged, and F/VF.