Family Gannets, Boobies (Sulidae)

Least Concern

Nazca Booby (Sula granti)


French: Fou de Grant German: Nazcatölpel Spanish: Piquero nazca

Sula granti


, 1902,

Culpepper (Darwin) Island, Galapagos Archipelago


Until recently considered conspecific with S. dactylatra, but breeds sympatrically and assortatively with it, differing in its orange (not yellow) bill and greater sexual dimorphism; compared with sympatric form personata, has shallower bill, shorter tarsus and longer wing; legs and feet olive-khaki to purple vs bright yellowish in dactylatra, but dark bluish-grey to olive-grey in personata; also differs in foraging preference, concentrating near shore, not out to sea; and in typical use of steep slopes, and not flat areas, for nesting. Monotypic.


Breeds on islands in CE Pacific from NW Mexico S, including Revillagigedo Is, Clipperton I, Cocos I (S of Costa Rica) and Malpelo I (off W Colombia), to Galapagos Is, La Plata I (Ecuador) and, more recently, Lobos de Afuera (NW Peru).

Descriptive notes

81–92 cm; wingspan 152–170 cm. Resembles S. dactylatra but adult has coral-pink bill with yellower tip, legs khaki to purple, iris golden-yellow to orangey, central... read more


Probably similar to Masked Booby but no specific information available.


Strictly marine and fairly pelagic. Prefers deeper waters than other boobies; in Galapagos, feeds... read more

Food and feeding

Shoaling fish, especially flying-fish (Exocoetidae) up to 28 cm long, generally taking larger prey than other boobies, including fish up to... read more


Breeds in loose colonies on oceanic islands. The large breeding colony on the Galapagos Is breeds during October–June. Clutch size is one... read more


Most adults spend all year in vicinity of colonies. However, young birds and some adults may... read more

Status and conservation

Not globally threatened (Least Concern). Found breeding off NW Peru (Lobos de Afuera Is) in 2004 and subsequently. Has a very large colony on Malpelo Is, Colombia, estimated... read more

Recommended citation

del Hoyo, J., Collar, N. & Garcia, E.F.J. (2020). Nazca Booby (Sula granti). In: del Hoyo, J., Elliott, A., Sargatal, J., Christie, D.A. & de Juana, E. (eds.). Handbook of the Birds of the World Alive. Lynx Edicions, Barcelona. (retrieved from on 29 February 2020).