BBC Wildlife Magazine - - Redonda Island -

Supremely aerial, the mag­nif­i­cent frigate­bird may even sleep on the wing and uses ther­mal vents to stay aloft for sev­eral days at a time. Un­able to swim as its plumage is not wa­ter­proof, it spe­cialises in mug­ging other seabirds for their catch in midair as they re­turn to their nests. Frigate­birds can be eas­ily iden­ti­fied by their forked tails and very long, an­gu­lar wings. But it is the males with their dis­tinc­tive gu­lar sac – a bright red bal­loon-like or­gan used to at­tract fe­males dur­ing the breed­ing sea­sonea­son – that tru­lyy set the na­tional bird of An­tiguaA apart.

Le eft: a male ma ag­nif­i­cent fri gate­bird in­flates his s gu­lar sac.

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