Biblio Summary - Larus occidentalis
Biblio summary for Larus occidentalis
 
Citation Sibley, D., 2003 The Sibley Field Guide to Birds of Western North America. Alfred A. Knopf, Inc., 471 p.
Ref. 114902 Sibley, D., 2003
Page 194
Named Used as Valid Larus occidentalis
Locality
Distribution North America.
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