Birds of Singapore
by the Bird Society of Singapore
Ardenna pacifica
Family: Petrels, Shearwaters, and Diving Petrels · Status: Vagrant · Size: 38–47 cm · Conservation: Least Concern
Ranges throughout the tropical Pacific Ocean and Indian Ocean.
Dark morph: uniformly dark brown, distinguished from Short-tailed Shearwater by longer toe extension past tail, proportionally longer bill, and more slender, smaller head. Pale morph: dark brown upperparts; differs from Streaked Shearwater by lack of white on face and black border on leading edge of underwing.
Pelagic; both Singapore records involved grounded birds (Woodlands, June 1998; Bishan-Ang Mo Kio Park, June 2021).
Flight direct, consisting of rapid wing beats interspersed between long glides.