Bornean Black-capped Babbler

A medium-sized dusky bird that prefers moist montane forests, but can be also found in most wooded areas with dense vegetation. Feeds in trees and on the ground. Its namesake white eye is distinctive, but its bright broken white throat collar, contrasting so markedly with its dark plumage, is also unique. Shier than the somewhat similar White-chinned Thrush, which has a dark eye, orange bill and legs, and lacks a white collar. The White-eyed Thrush’s song is a long series of highly variable, repeated phrases (phrases most often repeated thrice, but commonly from two to five times). Calls include a plaintive whistled “weee-woooo,” with the first note slightly higher and a quick, almost ducklike “yak.”

Small owl restricted to cloud forest in Colombia’s Santa Marta Mountains. Plumage is almost identical to that of Tropical Screech-Owl, with which it was confused until differences in voice were noted. Color is variable and ranges from dull brown to rusty. Typical song is a rapid series of soft notes that rises and then falls in pitch; it is much longer and steadier than the song of Tropical Screech-Owl, which is found in lower and drier parts of the mountains. Regularly encountered in and around El Dorado Nature Reserve.

Small leaf warbler with many extremely similar relatives. Like other “Pallas’s-type” leaf warblers, has olive-yellow upperparts, pale underparts, prominent brow and crown stripes, double wingbars, and a pale rump. Unlike Ashy-throated and Buff-barred Warblers, lacks any white on outer tail edges. Pallas’s averages yellower-headed and brighter overall. Gansu and Chinese Leaf Warblers can be incredibly similar, but Lemon-rumped averages whiter-browed and yellower-bellied than the former, more contrastingly-marked on the head than the latter, and darker-billed than both. As with many other physically similar leaf warblers, best distinguished by voice and habitat. Breeds in coniferous and mixed forests at mid- to high-elevation forests, though may descend into foothills in the winter. Two song types are both highly distinctive; one is a buzzy, descending rattling trill and the other is a series of high-pitched clicking twitters. Call is a loud, strident pair of notes: “pse-tew!”