Friedrich Nietzsche

There is no skin gland except the oil gland. The lower and upper and jaws are modified into a beak. The alimentary canal has a crop and a gizzard.

The feathers help in preventing heat loss and reduce air friction by providing passage to the air.

Genus

BIRDS

“A bird does not sing because it has an answer, it sings because it has a song. A bird sitting in a tree is never afraid of the branch breaking because its trust is not on the branch but on its own wings. Always believe in yourself.”

03

01

Their hind limbs are adapted for walking, hopping, perching, grasping, wading and swimming. There are epidermal scales on their legs.

Birds are warm-blooded animals. Their forelimbs are modified into wings. They have well-developed flight muscles that help during the flight.

02

Species

The endoskeleton is bony with long hollow bones filled with air cavities. known as pneumatic bones.