Gray-throated Bulbul

Distinctive streaky brown bird of riverine habitats of the Orinoco Delta. Most of body brown with buffy streaks (tear-shaped on underparts). Rich chestnut on chin, wings, rump, and tail. Sexes similar. Locally common and often in pairs, found from understory to canopy in riverine forest where often climbs trunks like a woodcreeper. Voice is an explosive group of short notes, mostly in duet. Similar to Orinoco Softtail (no range overlap), which is less streaked and has a buff eyebrow; Rusty-backed Spinetail is unstreaked. Endemic to the Orinoco River of northeastern Venezuela.

Small, long-tailed Curruca warbler, very similar to Spectacled and Subalpine Warblers. Males are distinctive with very deep rusty underparts, a rusty throat (sometimes paler mid-throat), rusty wings, and a hint of pale buff moustache. Females are pale brown and less distinctive with normally rather warm-toned underparts. Breeds on mountain slopes covered in dense, low bushes, tamarisk scrub, and vegetated desert wadis; non-breeding habitat is sometimes lower in elevation, but typically similarly open and scrubby. Song a scratchy whistle. Call a low "trrrrr."

A beautiful but elusive rainforest francolin. The face is well marked with black and gray, the back is brown, and the underparts have bold white spots. Males are darker, chestnut on the back and black below; females are browner. Roams around on the ground of interior rainforests at low to middle elevations. Very shy and difficult to see well. Similar to Nahan’s Francolin, but separated by the dark bill, the lack of red bare facial skin, and the yellow rather than red legs. Most often detected by vocalizations, which include a bubbly descending series and a duet of nasal notes and repeated, descending phrases.