The seabird Sula nebouxii, allied to the gannets (family Sulidae), which has pale blue feet and frequents tropical and subtropical areas of the east Pacific.
Origin
Late 19th century; earliest use found in The Auk.
Definition of blue-footed booby in US English:
blue-footed booby
noun
The seabird Sula nebouxii, allied to the gannets (family Sulidae), which has pale blue feet and frequents tropical and subtropical areas of the east Pacific.