Gray-and-gold Warbler

A nest parasite that lays its eggs in the nests of African and Black-bellied Firefinches and Brown and Dybowski's Twinspots. Breeding males are glossy black with blue iridescence and a pale brownish panel in the wings. Females and non-breeding males are streaky and brown on the back and pale below, with a bold facial pattern. The bill is whitish and the legs very pale purplish. Found locally in lush woodland, savanna, and cultivated areas. Given current knowledge, can only be confidently identified by mimicked vocalizations. Each male parasitizes only one of the four host species and imitates its vocalizations, often mixing them into a scratchy jumble of high-pitched notes. 

A little-known, highly unusual songbird confined to the island of Buru. Taxonomically confusing; formerly considered a white-eye, but now thought to be an abnormal, arboreal pipit. A plain-looking bird with dull olive upperside and gray upperparts, but with a diagnostic, conspicuous rust-colored throat. Inhabits stunted montane forest, where it behaves like a nuthatch, climbing up and down tree trunks, and often accompanies mixed-species flocks singly or in pairs. Only known vocalization is short, high-pitched, downslurred “zit” note.

Common piculet of coastal forests. Note short-tailed profile, large feet, and cone-shaped bill. Found in mangroves, gardens, abandoned plantations, and disturbed areas. Creeps quietly through vine tangles and bores into dead twigs at lower and middle levels. Similar to Golden-spangled and White-barred Piculets, but Arrowhead has chevron-shaped spots (not barring) on the breast and belly, and is strictly confined to coastal habitats.