Great Frigatebird

Great Frigatebird (Fregata minor) juvenile. Frigatebird adults are light, weighing between 1–1.8 kg (2.2–4 lb), and have the highest ratio of wing area to body mass, and the lowest wing loading of any bird. This has been hypothesized to enable the birds to utilize marine thermals created by small differences between tropical air and water temperatures. Galapagos Islands.

Great Frigatebird (Fregata minor) juvenile. Frigatebird adults are light, weighing between 1–1.8 kg (2.2–4 lb), and have the highest ratio of wing area to body mass, and the lowest wing loading of any bird. This has been hypothesized to enable the birds to utilize marine thermals created by small differences between tropical air and water temperatures. Galapagos Islands.

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