Nazca Booby (Sula granti) [XC18031]
by Fernando del Valle from Genovesa, Galapagos, Ecuador (call)
Nazca Booby (Sula granti) [XC766723]
by Barry Edmonston from Punta Suarez, San Cristobal, Islas Gal\u00e1pagos, Ecuador (call, song)
Subspecies
Sula dactylatra (Sibley and Monroe 1990, 1993) has been split into Masked Booby (Sula dactylatra) and Nazca Booby (Sula granti) following AOU (2000).
Considered by some authors to be a subspecies of Masked Booby (Sula dactylatra).