Streaked Shearwater Calonectris leucomelas

Large, fairly common shearwater of the western Pacific. White underparts, brown upperparts, and a mottled brownish-white head distinctive. Forages in both shelf and pelagic waters, often forming large flocks that prey on small fish pursued by larger predatory fish. Languid, gull-like flight except in high winds, when flight more wheeling, in large arcs. Occasionally seen from shorelines, especially during storms.