NEET BIOLOGY

Detailed explanation-1: -Perching birds like the crow, sparrow and mynahs have long, slender claws. They have four toes three in the front and one at the back. This kind of toes help the birds to hold the branches of trees firmly and they can even sleep while perching.

Detailed explanation-2: -Ducks and waterfowl are particularly good at this, though other birds such as Peregrine Falcons and Eurasian Blackbirds can do this as well. Species that use this adaptation may even be able to sleep while flying!

Detailed explanation-3: -Birds can be seen sleeping while perched on a branch, standing on one foot or clinging to bark. Some even sleep while flying. Studies show that birds can let one side of their brains sleep while the other side remains awake.

Detailed explanation-4: -Perching feet Over half the species of birds in the world are perching birds. These birds have a special hind toe that clasps the back of a branch, while the front toes hold the front. This helps the bird perch on branches securely.

Detailed explanation-5: -The answer is that birds grasp branches using their talons, and the reason that they don’t fall off while asleep is that it is an involuntary reflex. When they perch on a branch, that is when the land on the branch and they bend their legs to sit on it, their talons automatically clasp it and lock on to it.