Simple Greenbul

A dark brownish-gray cuckoo with an unusually long tail and barred underparts. Found in the understory and at middle levels of humid forest at low and middle elevations. Shy and retiring, most easily found by voice. Very similar to Olive Long-tailed Cuckoo and best separated by voice, but also identified by darker upperparts, broader barring on the underparts, and richer rufous on the undertail. There are two main vocalizations: a quick series of three rising whistles, and a long, rapid series of whistles that slows and falls slightly toward the end. In the far western part of the range, the three whistles are slow and each one is progressively higher in pitch; elsewhere, the whistles are fast and identical. 

A fairly small bustard of thick brush in dry country. The male has a buff crest that is usually hidden, and both sexes have a black belly. Found in dry savanna and thornscrub habitat with lots of bushes, unlike most bustards, which prefer grass-dominated habitats. Similar to Black-bellied and Hartlaub’s Bustards, but smaller, and prefers different habitats. Larger than Little Brown Bustard, with a black belly. The call is a rising and accelerating series of distressed-sounding notes that often precede the display: a quick flight up, then a plummet to the ground.

Unusual dark greenbul with upright posture that does strongly resemble a honeyguide. Males have a white eye and females a dark one. Both sexes show a large white patch in the outer tail. Found in the upper portions of lowland forest. Usually in pairs or small groups. Most often detected by call: a slow series of mewing whistles. Similar to Sjöstedt's Greenbul, but has darker gray underparts, and male further distinguished by its pale eye. Distinguished from honeyguides by its different shape, especially the longer tail. Flight is direct, unlike undulating flight of a honeyguide.