Brown Booby, Sula leucogaster
Brown Booby, 1/10/05, Los Islotes, BCR, Mexico
The feet on an adult Brown Booby should be yellow; on this one, they are shaded toward green. I thought this might be an juvenile Blue-footed Booby, but there is no sign of juvenile plumage, and the sharp division between brown and white on the chest further indicates Brown Booby.