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  2. Bird wing - Wikipedia

    en.wikipedia.org/wiki/Bird_wing

    The mute swan with outstretched wings Wing of the white-tailed eagle. Bird wings are a paired forelimb in birds. The wings give the birds the ability to fly, creating lift. Terrestrial flightless birds have reduced wings or none at all (for example, moa). In aquatic flightless birds , wings can serve as flippers. [1]

  3. Bird flight - Wikipedia

    en.wikipedia.org/wiki/Bird_flight

    Lesser flamingos flying in formation. When in gliding flight, the upward aerodynamic force is equal to the weight.In gliding flight, no propulsion is used; the energy to counteract the energy loss due to aerodynamic drag is either taken from the potential energy of the bird, resulting in a descending flight, or is replaced by rising air currents ("thermals"), referred to as soaring flight.

  4. Origin of avian flight - Wikipedia

    en.wikipedia.org/wiki/Origin_of_avian_flight

    Asymmetrical wing feathers, found on all flying birds with the exception of hummingbirds, help in the production of thrust and lift. 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.

  5. List of birds by flight speed - Wikipedia

    en.wikipedia.org/wiki/List_of_birds_by_flight_speed

    This is a list of the fastest flying birds in the world. A bird's velocity is necessarily variable; a hunting bird will reach much greater speeds while diving to catch prey than when flying horizontally. The bird that can achieve the greatest airspeed is the peregrine falcon (Falco peregrinus), able to exceed 320 km/h (200 mph) in its dives.

  6. Flying and gliding animals - Wikipedia

    en.wikipedia.org/wiki/Flying_and_gliding_animals

    However, some creatures can stay in the same spot, known as hovering, either by rapidly flapping the wings, as do hummingbirds, hoverflies, dragonflies, and some others, or carefully using thermals, as do some birds of prey. The slowest flying non-hovering bird recorded is the American woodcock, at 8 kilometres per hour (5.0 mph). [26]

  7. Ornithopter - Wikipedia

    en.wikipedia.org/wiki/Ornithopter

    An ornithopter (from Greek ornis, ornith-'bird' and pteron 'wing') is an aircraft that flies by flapping its wings. Designers sought to imitate the flapping-wing flight of birds, bats, and insects. Though machines may differ in form, they are usually built on the same scale as flying animals.

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  9. Alula - Wikipedia

    en.wikipedia.org/wiki/Alula

    When flying at slow speeds or landing, the bird moves its alula slightly upwards and forward, which creates a small slot on the wing's leading edge. This functions in the same way as the slats on the leading edge of the wing of an aircraft, allowing the wing to achieve a higher than normal angle of attack – and thus lift – without resulting ...