ansorge's greenbul Eurillas ansorgei

A small, slender greenbul often found in the canopy and subcanopy of tall trees in forests. Olive below and greenish above, with a gray head and indistinct white eye-arcs. Similar to other dully colored greenbuls, especially Gray Greenbul and Plain Greenbul, but note Ansorge’s preference for interior forest and canopy, its olive belly, and its distinctive song: a plaintive, three-parted whistle that can be likened to a drawn out pronunciation of the bird’s name: “An-sor-ge’s.”