Black-headed Whistler

Namesake white wing bars make this prinia relatively distinctive. Also note white throat, pale yellow belly, and black-and-white tips to tail feathers. Endemic to Java, Sumatra, and some smaller adjacent islands. Inhabits scrubby habitats, such as farm field edges and old plantations, as well as mangroves. Often seen in low vegetation, but forages at all levels of habitat. Sometimes forms small flocks outside the breeding season. Song is a twanging, repetitive “chwet-chwet-chwet” or “cheweet-cheweet-cheweet”. Calls include a sharp “chwit” and a harsh, nasal “jee!”

Sleek but sturdy gray bird with fierce pale eyes, endemic to the Sulu Archipelago, in the southwestern Philippines. Uniform overall, but darker on the tail, wingtips, and between the eye and bill. Inhabits lowland and foothill forest and forest edge, where forages at middle and upper levels, sometimes associating with other species. Gives a range of high-pitched and scratchy calls, including repeated squeal-whistles. Formerly treated as part of a more broadly-defined “Bar-bellied Cuckooshrike.”

Tiny warbler with a long bill and frequently cocked tail. Secretive, tending to stick to the brushy underlayer of hill and submontane forest. Often moves about solitarily, but can sometimes be found with mixed-species flocks, especially with small warblers and fulvettas. Green above and yellow below, with a pale gray throat. Somewhat resembles a Common or Dark-necked tailorbird, but only a fraction of the size, with a proportionally far longer bill, black eye-stripe, and bright orange forehead. Song is an extremely high-pitched tinkling series of whistled notes with an otherworldly quality. Calls include high descending trills and dry chittering.