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Há 3 dias · Not all birds can fly at high altitudes. Only some birds can fly high because of special adaptations that enhance the uptake, circulation, and efficient utilization of oxygen at high altitudes. Examples of high-flying birds include the Ruppell’s Griffon, the Bar-headed Goose, and the Mallard Duck.
Há 3 dias · High-flying birds (raptors) that soar in the sky have very similar-looking plumages and it is very difficult to tell the difference between them; so most bird experts use the shape of their wing feathers in flight to differentiate them.
Há 5 dias · 60–100 km/hr (40–60 mph)—the faster-flying birds such as falcons, ducks, geese, and domestic pigeons. A homing pigeon has been timed at 152 km/hr (94 mph). The fastest bird, however, is the peregrine falcon, whose speed in a dive has been measured in excess of 320 km/hr (200 mph).
Há 2 dias · Red knots and dunlins were found in radar studies to fly 5 km per hour faster in flocks than when they were flying alone. The birds flying at the tips and at the front are rotated in a timely cyclical fashion to spread flight fatigue equally among the flock members.
Há 5 dias · Among flying birds, the wandering albatross has the greatest wingspan, up to 3.5 metres (11.5 feet), and the trumpeter swan perhaps the greatest weight, 17 kg (37 pounds).
Há 3 dias · Birds fly around at sunset because they exchange information on feeding sites found in the day while flying in a murmuration. Birds like starlings tend to fly in murmurations in circles at sunset to provide protection against predators and to keep warm before roosting when night falls.
