Where do birds sleep at night?

Its been bothering me.. a poll in the pub has not been enlightening either.
Where and how exactly do birds sleep at night? I believe they 'roost'...but do they all have nests..or do they just pick a branch and perch? And do they hang on with their feet and stay upright all night...or do they lie down sideways (!) and curl up? Ive never seen a sleeping bird....

Depends on the bird... Woodpeckers sleep in a hollow in a tree, others build nests, others stand on branches and sleep, others sit on the ground and sleep.

others go home with a man they met in a bar....

"Where do birds sleep at night?"

Outside my bedroom window under the eaves. And they wake up at 4 in the freakin morning! Grrrrrrrrrr....

Play calming music to them. It may help to keep them asleep for a little bit longer.

Birds sleep??!!??

Super'

nests

My parrot, cockatiels and kakarikis sleep standing on one leg (on a perch) with their heads turned around so their beaks rest on their back.

Yeah...my birds sleep on perches with their heads turned around and resting on their backs....one of my birds cuddles up to a sock in his cage and sleeps beside the sock (clean of course)

My canary does the same as catalyst's and star's birds Although he's getting ancient, and sometimes he falls off