BOB GIBBONS / SCIENCE PHOTO LIBRARY BOB GIBBONS / SCIENCE PHOTO LIBRARY
Feet of a blue-footed booby (Sula nebouxii excisa). The blue feet of this seabird are used in courtship displays. There are several subspecies of blue-footed boobies, found on the Pacific coasts of Central America and northern South America, and on nearby islands. This is an endemic Galapagos subspecies. Photographed in the Galapagos Islands.
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