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Bar-headed geese have a slightly larger wing area for their weight than other geese, which is believed to help them fly at high altitudes. [20] While this decreases the power output required for flight in thin air, birds at high altitude still need to flap harder than lowland birds. [21]
A domestic goose is a goose that humans have domesticated and kept for their meat, eggs, or down feathers, or as companion animals.Domestic geese have been derived through selective breeding from the wild greylag goose (Anser anser domesticus) and swan goose (Anser cygnoides domesticus).
Geese flying in a V formation save energy by flying in the updraft of the wingtip vortex generated by the previous animal in the formation. Thus, the birds flying behind do not need to work as hard to achieve lift. Studies show that birds in a V formation place themselves roughly at the optimum distance predicted by simple aerodynamic theory. [101]
The adult geese will fly down to the ground and then "squawk" up at their babies to try and convince them to follow. It doesn't always work, however, which means the adults can be up there for a ...
For larger birds, flying in flocks reduces the energy cost. Geese in a V formation may conserve 12–20% of the energy they would need to fly alone. [30] [31] Red knots Calidris canutus and dunlins Calidris alpina were found in radar studies to fly 5 km/h (2.5 kn) faster in flocks than when they were flying alone. [19]
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.
David Evans said the party has spent too much time acting like a ‘gaggle on the ground’ rather than forming a ‘magnificent V-formation’.
Canada geese fly in a distinctive V-shaped flight formation, with an altitude of 1 km (3,000 feet) for migration flight. The maximum flight ceiling of Canada geese is unknown, but they have been reported at 9 km (29,000 feet). [43] Flying in the V formation has been the subject of study by researchers.