Red-footed Booby

The Red-footed Booby is the smallest member of the booby family and the most variable in plumage, occurring in several distinct color morphs ranging from all-white to brown and everything in between, though all forms share the diagnostic bright red feet and a pale blue-and-pink bill base. This variability can make identification tricky, but the small size, red feet, and typically pale bill tip help confirm the species.

Unlike other boobies, which nest on open ground, Red-footed Boobies are unusual in nesting in trees or shrubs, sometimes forming large mixed colonies with frigatebirds on remote tropical islands far from continental coasts.

Key field marks

• Bright red or coral-pink legs and feet, all morphs
• Small size relative to other boobies
• Variable plumage: white morph, brown morph, and intermediate forms
• Pale, bicolored bill with a blue-grey base and pink tip

Similar species

• Brown Booby is larger, with dark brown upperparts sharply cut off from white underparts, and has yellow-green (not red) feet.
• White-morph birds can suggest Masked Booby or Nazca Booby, but those species are larger, have black flight feathers extending further, and lack red feet.
• Juveniles are uniformly brownish with dark or dull pink feet, gaining red coloration with maturity.

Red-footed Boobies breed on remote, often predator-free tropical and subtropical islands across the Pacific, Indian, Atlantic, and Caribbean, favoring islands with trees or shrubs for nesting. Outside the breeding season, they are highly pelagic, ranging widely over open tropical and subtropical seas far from land.

Because suitable nesting habitat is limited to isolated islands, colonies can be extremely dense, and the species is largely absent from continental coastlines, distinguishing it ecologically from the more coastal Brown and Blue-footed Boobies.

Behavior

Agile fliers, Red-footed Boobies often forage far from the colony, sometimes at night, and are capable of both plunge-diving and aerial pursuit of flying fish that leap from the water.

Voice

Generally quiet at sea, they give harsh grunting and quacking calls at breeding colonies during greeting and courtship interactions.

Feeding

Flying fish and squid are important prey, often captured on the wing as they break the surface, in addition to fish taken by shallow plunge-dives.

Nesting and breeding

Pairs build stick nests in trees or dense shrubs, unusual among boobies, and typically raise a single chick per attempt, with both parents sharing incubation and feeding duties over an extended nesting period.