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A photo of a Wedge-rumped Storm Petrel (Hydrobates tethys)
Wedge-rumped Storm Petrel

Wedge-rumped Storm Petrel

Hydrobates tethys

The wedge-rumped storm petrel (Hydrobates tethys) is a storm petrel. It breeds in the Galápagos Islands and on the coast of Peru. It was formerly defined in the genus Oceanodroma before that genus was synonymized with Hydrobates. Swinhoe's storm petrel is a small bird, 18–21 cm in length with a 45–48 cm wingspan, though distinctly larger than the European storm petrel. It is essentially dark brown in all plumages, and has a fluttering flight, pattering on the water surface as it picks planktonic food items from the ocean surface. Unlike the European storm petrel, it does not follow ships. In structure it most resembles a Leach's storm petrel with its forked tail, longish wings, and flight behaviour, but does not have a white rump and the call differs. It is difficult to distinguish from other all-dark Hydrobates species, and the first English record had to be DNA-tested to eliminate the possibility that it was a Leach's storm petrel, since populations of north-eastern Pacific Leach's storm petrels contain individuals that show completely dark rumps.
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Wedge-rumped Storm Petrels on Birda

Photos

Sightings

A photo of a Wedge-rumped Storm Petrel photographed in Genovesa--Prince Philip's Steps Ecuador
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Simon Bradfield
Tuesday 08 Aug 2023 - 8:30am
Ecuador
A map showing the sighting location
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Ignacio Loera
Thursday 29 Jun 2023 - 12:45pm
A map showing the sighting location
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Ignacio Loera
Thursday 22 Jun 2023 - 6:17am
A map showing the sighting location
🙈
Kevin Huang
Wednesday 22 Feb 2023 - 8:30am
Ecuador
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