Species: Pelecanus occidentalis
Encyclopedia of Puget Sound

Size varies greatly depending on location, with the smallest individuals in the West Indies, medium birds on the coasts of the U.S. (Atlantic and Gulf), Central America, and Colombia and Ecuador, large birds on the coasts of California, Mexico, and Galapagos Islands, and very large in Peru and Chile (NGS 1983, Palmer 1962).
Articles:
This article was originally published by the Washington Department of Fish and Wildlife as part of its annual report Threatened and Endangered Wildlife in Washington.

Classification
Aves
Pelecaniformes
Pelecanidae
Pelecanus
NatureServe
Classification
Ecology and Life History
Size varies greatly depending on location, with the smallest individuals in the West Indies, medium birds on the coasts of the U.S. (Atlantic and Gulf), Central America, and Colombia and Ecuador, large birds on the coasts of California, Mexico, and Galapagos Islands, and very large in Peru and Chile (NGS 1983, Palmer 1962).