Lalage leucoptera
The Biak Triller (Lalage leucoptera) is a striking passerine endemic to the Biak archipelago, a true jewel of island speciation. Measuring approximately 14-15 cm in length, males exhibit a glossy black cap, mantle, and wings contrasting sharply with pure white underparts and a prominent white wing patch. Females, in contrast, are duller, presenting a gray cap and back, with paler underparts and a less distinct white wing panel, showcasing clear sexual dimorphism. It belongs to the Campephagid...
Found primarily in tropical moist lowland forests, the Biak Triller also adapts to forest edges, secondary growth, and disturbed wooded areas. It is typically observed from sea level up to low to mid-elevations across its limited range.
Primarily insectivorous, feeding on a variety of insects and their larvae gleaned from foliage and branches. It may occasionally supplement its diet with small fruits.
The Biak Triller is a diurnal bird, typically observed alone or in pairs, often moving with agility through the canopy and mid-story. Foraging involves gleaning insects and their larvae from leaves, branches, and bark, sometimes making short aerial sallies to catch prey. During the breeding seaso...
The Biak Triller is strictly endemic to the Biak archipelago, which includes Biak Island itself, along with nearby Supiori, Numfor, and Rani islands, all located off the northern coast of West Papua, Indonesia. This species is non-migratory, remaining within its island home year-round. There are ...
Least Concern
- The Biak Triller is an island endemic, found nowhere else in the world except the Biak archipelago of Indonesia. - Its scientific name, Lalage leucoptera, means 'white-winged' (leucoptera), referring to the prominent white patch on its wings. - Males and females display significant sexual dimor...