So that it can run fast away people that won't to eat it
Because of a Talented God and Creator!
Sandhill cranes sleep and make nests in trees.
They sleep with one leg up because when they go to sleep they shut down half their brain.
none, they can levitate... hope i was helpful :D
If it raised both of them it would fall down. True but birds also sleep on one leg at a time, they can put half their brain to sleep at a time and rest on the 'awake' leg.
They sleep standing on one leg and rotate during the night.
Budgies normally sleep on one leg with their head tucked under their wing, standing up!
Those pink birds are called flamingoes. The standing on one leg thing is not restricted to them, however - herons, cranes and many other water birds do it.
yes they do both day & night.
Flamingos stand while they are both awake and while they are sleeping. Flamingos sleep on one leg with their head tucked under a wing. The leg locks into position.
How to eat ,how to sleep on one leg,how to fly
It is to contain heat that would normally be lost through the uninsulated featherless limb. Some egrets and herons cast their shadow while standing on one leg to look like a tree shadow to attract fish.
Flamingo's sleep standing up. I witnessed it at a zoo:)