Boobies and gannets are large and distinctive in shape with long slightly crooked pointed wings, fairly long necks that taper into a slender head and long pointed bill, with a lot of neck and head extension in front of the wing. The rump and tail extend well behind the wings, tapering to a fairly narrow wedge-shaped tail that looks pointed in flight. Adults of this species are almost entirely white, with black wingtips and a yellowish wash on the crown and nape. The bill is very pale bluish-gray and the facial skin is dark bluish-gray; pale eye with a bright blue eyering. In flight, all white except extensive black wingtip. Immature birds vary from almost entirely gray-brown with white upper tail coverts on hatch-year birds, to mostly white by their third year. Second-year birds resemble an adult Blue-footed Booby but with some brown mottling on head and nape, and the base of the primaries and secondaries are paler in flight. Third-year birds are more like adults, but show a dark rump, dark trailing edge to the wing, and mottled upper wing coverts. Bill brown to muddy yellow. Juveniles could be confused with Brown or Masked Booby, which are smaller and more uniform.
Length: 94 (cm) Wingspan: 183 (cm)
Calls on nesting grounds are harsh and grating. At sea, gives crow-like khaa.
Forages and winters offshore. Nests on islands and cliffs.
Plunge-dives from great heights, folding wings back just before hitting the water. Glides or flaps steadily.
Diet consists of fish and squid.
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