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The Trindade petrel (Pterodroma arminjoniana) is a species of seabird and a member of the gadfly petrels. The bird is 35–39 cm (14–15 in) in size, with an 88–102 cm (35–40 in) wingspan.

Trindade petrel
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Aves
Order: Procellariiformes
Family: Procellariidae
Genus: Pterodroma
Species: P. arminjoniana
Binomial name
Pterodroma arminjoniana
Giglioli & Salvadori, 1869

The petrel has various color morphs: dark and light, as well as intermediates between the two. Previously, two separate populations were considered conspecific, one occurring in the south Pacific, sometimes seen in Hawaii; the other occurring in the south Atlantic, nesting off Brazil, with regular sightings in the Gulf Stream off the southeastern United States. The little-known Pacific birds were then split and determined distinct as the herald petrel, Pterodroma heraldica. It uses oceanic islands and atolls, nesting on cliff ledges, ridges or rocky slopes. On some islands, nesting birds are threatened by feral cats and rats.

Due to ongoing habitat loss and small breeding range, this species is evaluated as vulnerable on the IUCN Red List of Threatened Species.


  • "National Geographic" Field Guide to the Birds of North America ISBN 0-7922-6877-6
  • Seabirds, an Identification Guide by Peter Harrison, (1983) ISBN 0-7470-1410-8
  • Handbook of the Birds of the World Vol 1, Josep del Hoyo editor, ISBN 84-87334-10-5
  • "National Audubon Society" The Sibley Guide to Birds, by David Allen Sibley, ISBN 0-679-45122-6

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