Alternative names: Wilson's Shearwater; Mother Carey's Chickens
- Oceanites oceanicus
Length 7.25" (18 cm), wingspan 16-18" (41-46 cm). Dark blackish brown except for bold U-shaped white rump patch that extends onto flanks, pale carpal bars and underwings. Square tail may appear notched. Long legs extend beyond tail in flight. Relatively short wings. Fluttery, swallow-like flight. Feeding behavior of tapping surface of water with toes while hovering is distinctive.
Two subspecies are recognized:
- oceanicus is a mainly temperate species mostly limited to the southern hemisphere
- exasperatus is a high arctic breeder that is highly migratory, routinely found in the northern hemisphere in southern winter
The diet includes planktonic food items picked from the ocean surface.
It is nocturnal at the breeding sites to avoid predation by gulls and skuas.
- Clements, J. F., T. S. Schulenberg, M. J. Iliff, S. M. Billerman, T. A. Fredericks, B. L. Sullivan, and C. L. Wood. 2019. The eBird/Clements Checklist of Birds of the World: v2019. Downloaded from http://www.birds.cornell.edu/clementschecklist/download/
- Alvaro Jaramillo. 2003. Birds of Chile. Princeton Field Guides. ISBN 0-691-11740-3
- BirdForum Opus contributors. (2023) Wilson's Storm Petrel. In: BirdForum, the forum for wild birds and birding. Retrieved 1 December 2023 from https://www.birdforum.net/opus/Wilson%27s_Storm_Petrel
GSearch checked for 2020 platform.