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Photo by © olivewarbler
Near Gorgona Island, Colombia northern Pacific, 11 March 2008
Alternative name: Brewster’s Booby
- Sula brewsteri
Identification
Variation
Male Cocos Booby has a head varying from being entirely whitish to having white restricted to forehead.
Similar Species
Male Cocos Booby has head more whitish, bill more grayish-blue, and gular pouch more greenish-blue, when compared to Brown Booby. Female Cocos Booby has a whitish forehead where Brown Booby is brown. Underwing of both sexes also differ, with lesser wing coverts showing a brown bar in Cocos B. which is absent in Brown B.
Distribution
In areas on and around the Cocos tectonic plate which gave this species it's name. Breeds on islands from the Gulf of California to islands off Colombia (including on the Cocos Island west of Costa Rica).
Taxonomy
Cocos Booby was formerly included in Brown Booby.
Subspecies
Clements recognizes these subspecies[1]:
- S. b. brewsteri: islands in Gulf of California and off western Mexico
- S. b. etesiaca: Pacific islands off Central America and Colombia
Habitat
Behaviour
Vocalisation
References
- Clements, J. F., P. C. Rasmussen, T. S. Schulenberg, M. J. Iliff, T. A. Fredericks, J. A. Gerbracht, D. Lepage, A. Spencer, S. M. Billerman, B. L. Sullivan, M. Smith, and C. L. Wood. 2024. The eBird/Clements checklist of Birds of the World: v2024. Downloaded from https://www.birds.cornell.edu/clementschecklist/download/
- Gill, F, D Donsker, and P Rasmussen (Eds). 2024. IOC World Bird List (v 14.2). Doi 10.14344/IOC.ML.14.2. http://www.worldbirdnames.org/
Recommended Citation
- BirdForum Opus contributors. (2024) Cocos Booby. In: BirdForum, the forum for wild birds and birding. Retrieved 27 December 2024 from https://www.birdforum.net/opus/Cocos_Booby
External Links
GSearch checked for 2020 platform.1
