Male: Plumage dark brown except for white belly, underwing and under tail-coverts. Naked face. Eye, white or grey. Eye-ring, blue. Chin, blue. Bill, base blue and rest grey-cream. Feet, green-yellow. Webbing, green-yellow.
Female: Plumage dark brown except for white belly, underwing and under tail-coverts. Eye-ring, yellow-green. Chin, yellow-green. Bill, base yellow-green and rest grey-cream. Feet, yellow. Webbing, yellow. Blue patch in front of eye.
Immatures: Dull brown where adult is dark. Pale grey where adult is white. Face, green-yellow. Chin, green-yellow. Bill, base green-yellow and rest pale green. Feet, green-yellow.
Other Names (World)
Brown Booby, Brown Gannet, Black Gannet, Common Booby, White-bellied Booby, White-bellied Gannet
American Samoa, Anguilla (B), Antigua and Barbuda, Argentina, Aruba, Australia (B), Bahamas, Barbados, Belize, Brazil, British Indian Ocean Territory (B), Brunei Darussalam, Canada, Cape Verde, Cayman Islands, China (mainland), Christmas Island (B), Cocos (Keeling) Islands (B), Colombia, Comoros, Cook Islands (B), Costa Rica, Cuba, Djibouti, Dominica, Dominican Republic, Ecuador, Egypt, El Salvador, Equatorial Guinea, Eritrea, Fiji (B), French Guiana, French Polynesia (B), Gabon, Grenada, Guadeloupe, Guam (NB), Guatemala, Guinea (B), Guinea-bissau, Guyana, Haiti, Honduras, India, Indonesia, Israel, Jamaica (B), Japan, Jordan (NB), Kenya, Kiribati, Liberia, Madagascar, Malaysia, Maldives, Marshall Islands (B), Martinique, Mauritania, Mayotte, Mexico, Micronesia [Federated States of] (B) (NB), Montserrat, Myanmar, Nauru (NB), Netherlands Antilles, New Caledonia (B), Nicaragua, Nigeria, Northern Mariana Islands (B), Palau (B), Panama, Philippines (B), Puerto Rico, Samoa, Sâo Tomé e Principe (B), Saudi Arabia (B), Seychelles, Singapore, Solomon Islands (B), Somalia, Sri Lanka, St Helena, St Kitts and Nevis, St Lucia, St Vincent and The Grenadines, Sudan, Suriname, Taiwan (China), Thailand, Timor-Leste (NB), Tonga (B), Trinidad and Tobago, Turks and Caicos Islands (B), United States Minor Outlying Islands (B), USA, Vanuatu (B), Venezuela, Vietnam, Virgin Islands (British) (B) (NB), Virgin Islands (U.S.) (B) (NB), Wallis and Futuna Islands (B), Yemen (B).
Vagrant to Benin, Bermuda, Gambia, Ghana, Hong Kong (China), Morocco, Mozambique, New Zealand, Oman, Portugal, Senegal, Sierra Leone, South Africa, Spain, United Arab Emirates, Uruguay.
Unknown to Chile.
Population
Estimated population is 200,000 (2010).
The Field Guide to the Birds of Australia Pizzey, G., and Knight, E., 1997, Angus & Robertson, Sydney ISBN 0 207 19691 5
Field Guide to Australian Birds Morecombe, M., 2000, Steve Parish Publishing Pty Ltd. ISBN 1 876282 10 X
Field Guide to the Birds of Australia Simpson, K., and Day, N., 1999, 6th Edition, Viking ISBN 0 670 87918 5
Reader's Digest Complete Book of Australian Birds 1988, 2nd Edition, Reader's Digest ISBN 0 949819 99 9
What Bird is That? 1984, Revised Edition, Angus & Robertson, Sydney ISBN 0 207 14846 5
Handbook of Australian, New Zealand & Antarctic Birds 1990 - , Oxford University Press, Melbourne ISBN 0 19 553244 9
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BirdLife International Species Factsheet