Great Frigatebird

A pirate of the skies with the largest wingspan-to-weight ratio of any bird/Small Animals

The great frigatebird (Fregata minor) has the largest wingspan-to-body-weight ratio of any bird, with a 2.3 meter wingspan but a body mass of only about 1.5 kg. This allows it to soar for weeks without landing, sleeping on the wing in 10-second bursts. Males inflate a bright red throat pouch to the size of a basketball during courtship. Frigatebirds are kleptoparasites, harassing other seabirds in flight until they regurgitate their catch. They cannot swim or walk well, making them almost entirely aerial.