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Why Monitor Birds? (U.S. National Park Service)
Frigatebird - Wikipedia
UFWS releases Birds of Conservation Concern 2021 report - The Wildlife Society
Man-o'-war birds – Wild Bird Conservation
Rio romance between wild and caged macaws becomes Brazilian zoo sensation - The Washington Post
World's Oldest Known Wild Bird Turns 70 and Returns to Midway Atoll, by U.S. Fish and Wildlife Service: Pacific Islands, Conservation in the Pacific Islands
Man-o-war Birds - 10,000 Birds
Why are one-fifth of the world's migratory species facing extinction?, Wildlife News
Man-o'-war birds – Wild Bird Conservation
Bird Families of the World - Lynx Nature Books