What Are Birds ?
Bird is the group of vertebrates having feathers and wings. They have beak instead of mouth like other animals. The birds lay eggs from which the chicks hatched out after a certain period of time.
Kinds of Birds
Basically birds are of two kinds
1- Flying Birds:
These birds have strong wings due to which they can fly easily. The weight of such kind of birds not heavier. Hollow bones of these birds provide the facility of flying by reducing their weight.
Example: Sparrow, Crow, Pigeon etc. etc.
2- Running Birds:
These birds have strong legs for running. Their heavy weight does not allow them to fly like other small birds.
Example: Ostrich, Turkey, Hen etc. etc.