Why do birds usually sit on their eggs?

All eggs look the same.

How do birds take care of their babies?

Choose the correct word from the bracket and fill in the blank:

[warm, cold, lay, fly]

Birds sit on their eggs to keep them _____.

Choose the suitable word given below and fill in the blank.

(backbones, horns, trees, humps, tails)

_____ of birds help in changing the direction.

Before the eggs are ready to hatch, they need to be 

Draw and explain the structure of a bird egg.

Which bird has a pouch-like beak?