Alicorto de Filipinas Brachypteryx poliogyna

A small, dark songster of montane rainforest floor and undergrowth in the Philippines. Male is overall dark, blue-gray with an indistinct, often concealed white eyebrow. Female has a dark gray body with a paler belly, and brown head and base to the undertail. Forages on the ground of various types of forest, including bamboo, fern, and mossy forest. Song is an up-and-down melody of long whistles, broken into short separate notes. Call, a repeated, soft double-note “biirrick!”