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Author: Spear, Larry B.; Howell, Steve N. G.; Ainley, David G.
Year: 1992
Title: Notes on the At-Sea Identification of some Pacific Gadfly Petrels (Genus: Pterodroma)
Journal: Colonial Waterbirds
Volume: 15
Issue: 2
Pages: 202-218
Keywords: distributions; identification; criteria; petrels; pterodroma

Abstract: Although recent field guides have helped considerably in the identification of seabirds, criteria given for identify some eastern Pacific Ocean species of gadfly petrels (Genus: Pterodroma) at sea are inadequate. We herein present previously undescribed criteria on identification of five problematic groups. We also review published criteria.