Waterfall Swift

A small bird, yellowish-olive above, buffy-olive below, with a bold white eye-ring, a yellow spot in front of the eye, and a thin black stripe from the bill under the eye. Found in forest and scrub. Voice includes squeaky chirps and high-pitched short whistles.

Large dark-backed gull. Few similar species in much of its range. Usually coastal. Adults have black backs and wings with very little white in the flight feathers. The bill is very strong and robust and the legs are greenish-yellow. Juveniles have a dark brown back mottled with white, a black bill, and a dark band on the tail.

Gangly, stretched-out-looking black-and-white seabird. Strikingly slender and strange-looking in flight. Breeds in the rainforest canopy of Christmas Island, and forages in the adjacent ocean. Some birds, especially immatures, will forage much farther afield, but the extent of these rangings is still poorly understood. Bizarre long-necked and slender-winged profile is unique, and should readily distinguish this species from any others in range. Bill is pale pink in females and grayish in males.