World Bird List

Species factsheet
Masked Booby (Sula dactylatra)

Order: Sula dactylatra
Family: Gannets, Boobies (Sulidae)

Danske navn: Maskesule

Voices can be found here (external link)
Subspecies and Distribution
Subspecie Distribution
dactylatra Caribbean and sw Atlantic islands
melanops Red Sea, nw Indian Ocean
tasmani Tasman Sea
personata s, e Indian Ocean and the Pacific to islands off w Mexico and w South America.