portrait

Blue-footed booby Sula nebouxii excisa - male


Island: Baltra
Location: Near municipal pier
Year: 2002

Sexual dimorphism in blue-footed boobies is expressed in calls and in the apparant size of the pupils (small for males, large for females.)

portrait

female


Island: Baltra
Location: Near municipal pier
Year: 2002

Note: Foot color varies with the individual and does not indicate gender.


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