Mindanao White-eye Heleia goodfellowi

A fairly small bird of montane forest on Mindanao. Olive on the upperparts, darker in the wing and tail, with a blackish mask, dingy yellow underparts, and a pale gray throat. Usually found in mixed-species flocks with Cinnamon Ibon, Mountain White-eye, and Black-and-cinnamon Fantail. Similar to Yellow-bellied Whistler, but usually found at higher elevations, and has a thinner bill and dark mask. Gives a musical whistle and also a harsh grating call.