SPECIES

Bermuda Petrel Pterodroma cahow

Edward S. Brinkley and Kate Sutherland
Version: 2.0 — Published November 16, 2020

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Chick.
Head detail of chick.
Head detail of chick.
Molting bird with the appearance of a white collar.
Molting bird with the appearance of a white collar.
Dorsal view.

Dark gray above, with the uppertail coverts narrowly whitish at the base. In some adults, the greater coverts, rump feathers, and outer primaries appear slightly or noticeably darker, thus forming an "M" pattern on the upperparts of the flying bird.

Ventral view.

Ventrally, adults are white, with the medium grayish "cowl" slightly segregating the throat from the breast. From below, the dark gray remiges contrast starkly with the mostly white greater underwing coverts, and the leading edge of the wing is blackish . In most individuals there are dusky gray subapical marks, often in the shape of a fingerprint, in the greater primary coverts and also sometimes in the greater secondary coverts of the underwing. Axillaries and humeral coverts are white, so that the black bar of the leading edge of the wing appears to angle in toward the belly and end before it reaches the body.

Head detail of Bermuda Petrel.

Bill and eyes are black.

Recommended Citation

Brinkley, E. S. and K. Sutherland (2020). Bermuda Petrel (Pterodroma cahow), version 2.0. In Birds of the World (T. S. Schulenberg, B. K. Keeney, and S. M. Billerman, Editors). Cornell Lab of Ornithology, Ithaca, NY, USA. https://doi.org/10.2173/bow.berpet.02