How do you sleep?

How do you sleep, bird? I fly in my sleep.
How do you sleep, bat? I sleep upside down.
How do you sleep, bullfrog? I rest on my side.
How do you sleep, octopus? I change colour in my dreams.
How do you sleep, duck? We take turns to guard each other.
How do you sleep, baby owl? I sleep on my face.
How do you sleep, otter? We sleep holding hands.
How do you sleep, walrus? I sleep on the land and under the water.
How do you sleep, giraffe? We sleep on each other.
How do you sleep, meerkat? We sleep in a heap.
How do you sleep, Pula? Goodnight! Sleep tight!

How do you sleep?