How do these animals sleep?

Question

does anyone know how birds sleep while having at least one foot perched and how whales and dolphins sleep?? These animals either have to be standing up or underwater so how do marine mammals sleep if they'd have to keep swimming to not drown?

Answer 1

Birds "lock" their legs, for perching birds, the mere fact of bending the leg tightens the toes, so the bird's weight is what locks it to the branch.
Dolphins are notorious for sleeping with only one side of their brain asleep (and the other awake) at a time.

Answer 2

The key phrase among all these animals is unihemispheric sleep.

And how do birds manage to sleep on those little perches without falling off? This is because of a special tendon in their legs that reaches from thigh to toe. When the bird sleeps, the knee bends, the tendon pulls tight and clasps the toes around the branch. Some birds sleep standing on one leg.

Some birds sleep in short bursts, and some, like swifts, even sleep while flying. Like people, most birds like it dark when they sleep

Birds have another special "power." They can sleep with one eye open.This is called unihemispheric sleep, and what it means is that half the brain is asleep and the other half awake.This gives them the ability to watch for enemies and still catch up on their sleep. Birds aren't the only creatures with this ability.

Dolphins and seals can swim while asleep. The solution for whales and dolphins is to let one half of the brain sleep at a time. In this way, the animal is never completely unconscious, but it still gets the rest it needs.

And where do dolphins and whales sleep? They could probably sleep anywhere, but it makes sense that they would do it near the surface of the ocean so they can come up for air easily. It's not uncommon to see dolphins "logging," swimming slowly along the surface, with very little movement. Presumably, these are dolphins at rest.

Answer 3

just recently watched a show on the whales and they mentioned sleeping, they said they only close one eye, and shut down half of their brain to sleep

weird

Answer 4

they dont sleep.
they just party the whole night.
woot woot :] !