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Small birds are the major part of the gabar goshawk's diet, with small mammals, reptiles, and insects also taken on occasion. The prey is typically flushed from trees and caught following a persistent and energetic pursuit. The gabar goshawk sometimes hunts from the perch, swooping down to catch prey off the ground or in flight.
A small bird 11 to 13 cm in length and around 10 g in weight, it has a conspicuous ring of white feathers around its eye. There are a number of plumage variations depending on the sub-species. Generally it has olive-green wings and either a grey or olive-green back, a lighter coloured throat - yellow or grey, flanks that range from chestnut to ...
Birds (flying, soaring) – Most of the approximately 10,000 living species can fly (flightless birds are the exception). Bird flight is one of the most studied forms of aerial locomotion in animals. See List of soaring birds for birds that can soar as well as fly. Townsends's big-eared bat, (Corynorhinus townsendii) displaying the "hand wing"
The little eagle is a medium-sized bird of prey, measuring 45–55 cm (17–21.5 inches) in length and weighing 815 g (1.8 lb), roughly the size of a peregrine falcon. [7] It has fully feathered legs and a square-cut, barred tail.
Anything that moves through the air produces drag due to friction. The aerodynamic body of a bird can reduce drag, but when stopping or slowing down a bird will use its tail and feet to increase drag. Weight is the largest obstacle birds must overcome in order to fly. An animal can more easily attain flight by reducing its absolute weight.
The chimney swift is a monogamous breeder which normally mates for life, though a small percentage of birds change partners. [53] Pairs perform display flights together, gliding with their wings upraised in a steep "V", and sometimes rocking from side to side.
Approximately two billion birds, or one in three birds migrating through the U.S., fly through the Lone Star State.
The eyes are small, but the pupils are relatively large, allowing the highest light-gathering capacity of any bird (f-number of 1.07). [8] The retina is dominated by rod cells , 1,000,000 rods per mm 2 , the highest density of any vertebrate eye, [ 8 ] which are organised in layers, an arrangement unique among birds but shared by deep-sea fish .