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The female is brownish black with a rusty brown mantle and chest, and normally lacks any white patches present on the front of female birds of other species. The occasional female observed with a white belly may be breeding before obtaining the full adult plumage. [37]
The lesser frigatebird is the smallest species of frigatebird and measures 66–81 cm (26–32 in) in length with a wingspan of 155–193 cm (61–76 in) and long forked tails. Male birds weight 625–875 g (1.378–1.929 lb). Female birds are heavier and weight 760–955 grams (1.676–2.105 lb). [4]
The magnificent frigatebird (Fregata magnificens), frigate petrel [2] or man o' war [3] is a seabird of the frigatebird family Fregatidae. With a length of 89–114 centimetres (2 ft 11 in – 3 ft 9 in) and wingspan of 2.17–2.44 m (7 ft 1 in – 8 ft 0 in) it is the largest species of frigatebird.
The great frigatebird (Fregata minor) is a large seabird in the frigatebird family.There are major nesting populations in the tropical Pacific Ocean, such as Hawaii and the Galápagos Islands; in the Indian Ocean, colonies can be found in the Seychelles (on Aldabra and Aride Islands) and Mauritius, and there is a tiny population in the South Atlantic, mostly on and around St. Helena and ...
Adult female Juvenile Chick. The Ascension frigatebird (Fregata aquila) is a seabird of the frigatebird family Fregatidae which breeds on Boatswain Bird Island and Ascension Island in the tropical Atlantic Ocean. The Ascension frigatebird is a large lightly built seabird with brownish-black plumage and a deeply forked tail.
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The Christmas frigatebird (Fregata andrewsi), or Christmas Island frigatebird, is a seabird of the frigatebird family Fregatidae which is an endemic breeder to Christmas Island in the Indian Ocean. Apart from the Ascension frigatebird , the three other species of frigatebird have much more widely distributed breeding locations.
Sexual selection in birds concerns how birds have evolved a variety of mating behaviors, with the peacock tail being perhaps the most famous example of sexual selection and the Fisherian runaway. Commonly occurring sexual dimorphisms such as size and color differences are energetically costly attributes that signal competitive breeding ...