Short-tailed Shearwater

Small falcon with distinctive male plumage: gray head, rusty back, gray tail with broad black tip. Female is brownish above, with barring on the back, wings, and tail. Note rather pointed wingtips (unlike rounded wings of Accipiter hawks), and distinct dark spotting on the breast. Inhabits open and lightly wooded country, farmlands, grasslands, and heathlands; often seen over grassy areas beside roads and at airports. Perches on wires and posts, and typically hunts by hovering, at times fairly high overhead. Very similar to Lesser Kestrel.

A fairly small bird of wooded areas on the Bay Islands. Low crest is flattened at the front and rounded at the back. Male is glossy black with a purplish-blue iridescence. Female is medium gray above, pale gray below with brownish flight feathers and a darker mask, contrasting with the pale throat. Male similar to male Shining Flycatcher, but Biak is found in forest rather than waterside thickets and is smaller and less glossy. Often found in pairs and female has gray rather than rufous upperparts. Voice, a simple up-and-down whistled song and raspy call.

A lithe, medium-sized bustard with black daubs on a mostly tan-colored back. The male has a black belly, neck stripe, throat, and face patch. The female is uniform buff-brown from the belly to the head. In flight, both sexes have white windows in the wings. Singles and pairs inhabit tall grassland and grassy savanna. Its strange display involves the male stretching his neck and making a frog-like “kwoork” croak, and as he retracts his head to the shoulders, follows with a “grrrr” growl and champagne-cork-like “pop” while his head lifts again. He also performs an aerial display with the wings held back rigidly and with a puffed throat exposed.