Ascension frigatebird  (Fregata aquila)

Description

With a large wingspan and light-weight body, the Ascension frigatebird is a masterful glider (2) (3). In common with other frigatebirds, this species has a deeply forked tail, hooked bill, and distinctly pointed wings (3). The adult male is black overall, with a glossy green and purple sheen, but during courtship it develops a bright red gular that inflates to form an impressive heart-shaped balloon. The adult female is more rusty-brown, particularly around the collar and breast, and some individuals have patches of white on the breast and abdomen (2) (4) (5). Although similar in appearance to the females, juveniles are readily distinguished by their conspicuous white heads (4) (5).

Darwin Now is the British Council's contribution to the international celebration of the 200th anniversary of Darwin's birth and the 150 year anniversary of the publication of On The Origin of Species
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