Wedge-rumped Storm-Petrel Oceanodroma tethys

  • Order: Procellariiformes
  • Family: Hydrobatidae
  • Polytypic: 2 subspecies
  • Authors needed...
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Appearance

Distinguishing Characteristics

17 cm. 18 g. Small size. A large white and triangular patch on the rump is distinctive. The uppertail appears rather dull white because of dark feather-shafts. The rest of the plumage is blackish brown with a paler diagonal bar across upper surface of the wings. Bill and legs dark. Males and females are similar.

Similar Species

Wilson´s Storm-Petrel (Oceanites oceanicus) is larger, has yellow legs; the U-shaped patch on rump just reaches the center of the black tail. In Band-rumped Storm-Petrel (Oceanodroma castro) the white of rump forms a straight band on black tail and extends to the flanks and underneath the feathers that cover undertail. Leach´s Storm-Petrel (Oceanodroma leucorhoa) rump varies, from almost entirely white (more or less divided with fuscous feathers) to completely dark.

Detailed Description

Information needed. Contribute

Recommended Citation

Wedge-rumped Storm-Petrel (Oceanodroma tethys), In Neotropical Birds Online (T. S. Schulenberg, Editor). Cornell Lab of Ornithology, Ithaca, NY, USA. retrieved from Neotropical Birds Online: https://neotropical.birds.cornell.edu/Species-Account/nb/species/wrspet