Author: Spear, Larry B.; Howell, Steve N. G.; Ainley, David G.
Title: Notes on the At-Sea Identification of some Pacific Gadfly Petrels (Genus: Pterodroma)
Journal: Colonial Waterbirds
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.