Page 202 - New Medley 3 Semester 1

HOW DO BIRDS FLY

Birds have some special features which help them y.
 Birds have a boat-shaped or streamlined body.

 ey have wings.

 eir bones are hollow, light and lled with air.

e wings of birds move in two
ways—upstroke and downstroke.
In upstroke, the wings move

upwards and backwards while in
downstroke, they move downwards

and forwards. The wings are
attached to the body with strong A bird in upstroke A bird in downstroke

muscles, called ight muscles. e ight muscles move the wings while ying.
FEATHERS OF BIRDS

Feathers of birds are of di erent colours. ey save the

birds from cold and rain as they do not let the water stay

on the body.

Kinds of feathers Down feathers

Birds have two types of feathers:

1. Down feathers: e feathers that cover the whole body

of a bird are called down feathers. ese feathers are

small, so and u y. ey keep the body warm. Flight feathers

2. Flight feathers: e feathers that are Knowledge Zone

attached to the wings are called ight The tail feathers help the birds
feathers. ese feathers are long, at and change the direction while flying.

strong. ey help the birds y.
KINDS OF BIRDS
Birds can be grouped into many types. Some of them are given below.

Flying Birds

e birds that y are called ying birds. eir hollow and air- lled bones make

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