Nazca Booby (Sula granti) [XC332839]
by Oscar Campbell from Isla Genovesa, Galapagos, Ecuador (begging call, call)
Nazca Booby (granti) [XC680747]
by Roger Ahlman from Isla de la Plata, Manab\u00ed Province, Ecuador (uncertain)
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).