Plain bush-hen Amaurornis olivacea

A large ground bird of grass, scrub, and forest edge, usually close to water. Slate-gray on the head and underparts, blending to a brown back and tail. Note the greenish-yellow bill and the long yellow legs. Similar to Tabon Scrubfowl, but usually found near water and outside of forest, and distinguished by yellow legs, thicker bill, and lack of bare facial skin. Highly vocal and much more often heard than seen. Voice includes a rhythmic quacking and harsh rasps.