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Bird flight is the primary mode of locomotion used by most bird species in which birds take off and fly. Flight assists birds with feeding, breeding, avoiding predators, and migrating. Bird flight includes multiple types of motion, including hovering, taking off, and landing, involving many complex movements.
Eurasian cranes in a V formation (video) Birds flying in V formation. A V formation is a symmetric V- or chevron-shaped flight formation.In nature, it occurs among geese, swans, ducks, and other migratory birds, improving their energy efficiency, while in human aviation, it is used mostly in military aviation, air shows, and occasionally commercial aviation.
Weight is the largest obstacle birds must overcome in order to fly. An animal can more easily attain flight by reducing its absolute weight. Birds evolved from other theropod dinosaurs that had already gone through a phase of size reduction during the Middle Jurassic, combined with rapid evolutionary changes. [3]
Disc 3 then concludes with a previously released b-side, and a previously unreleased album outtake. The US version of the album has a remixed and re-titled version of "Birds Fly (Whisper to a Scream)". The US remix does not include the female spoken introduction heard on the UK mix. The US album was released by Arista Records.
Pilots sometimes fly at the aircraft's best L/D by precisely controlling airspeed and smoothly operating the controls to reduce drag. However the strength of the likely next lift, minimising the time spent in strongly sinking air and the strength of the wind also affects the optimal speed to fly. Pilots fly faster to get quickly through sinking ...
Earthflight departs on its grand European tour, using a host of techniques including taking extraordinary footage from microlights as they fly alongside imprinted birds with pilots like Christian Moullec. Among other wonders, cameras soar with cranes and geese over Venice, the white cliffs of Dover and Edinburgh.
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Some birds will respond to a shared song type with a song-type match (i.e. with the same song type). [24] This may be an aggressive signal; however, results are mixed. [23] Birds may also interact using repertoire-matches, wherein a bird responds with a song type that is in its rival's repertoire but is not the song that it is currently singing ...