Why do geese stand on one leg?

Answer

Geese stand on one leg to help regulate their body temperatures. This stance is used in an attempt to help the geese conserve as much body heat as possible.

Like other birds, a goose does not have warm feathers covering its legs. This lack of insulation in the lower extremities causes a decrease in body temperature. A goose lifting one foot allows the lifted leg to be closer to the bird's central body heat and warm feathers, which causes the body temperature to bump back up. This one-legged stance is rotated between legs, so each appendage has an opportunity to keep warm.

Reference:
Q&A Related to "Why do geese stand on one leg?"
The most important reason birds stand on one leg is to conserve body heat and energy.
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It is commonly thought that standing on one leg might reduce fatigue in the birds' legs, or that it allows the flamingo to escape from predators more easily. Another unproven theory
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Some people have only one night stand, because they do not have enough room for two. Some people do not have very big bedrooms and only one night stand will fit.
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The short and simple answer is to conserve body heat. The legs of birds receive a lot of blood and when they curl their leg up close to their body they lose a lot less heat.
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