D. Answer the following questions in brief.
1. Name three birds who work in pairs to make their nests.
2. Why are birds called as 'aerial animals'?
3. List some materials that are used by various birds to make
4. When, and where does a barbet make its nest?
5. List some places where we find birds' nests.
E. Answer the following questions.
1. Write any three features of birds that help them to fly.
2. How are nests useful for birds?
3. How does a tailor bird make its nest?
4. What do you mean by migration of birds? Name any two m
birds
VAT nood nogion
Answers
Ans.
1]The three birds are -
I. Hamerkop
II. Ruby throated
III. Bald eagle
2]Birds are called 'aerial animals' as they can fly, glide or soar in air.
3]The materials used by birds to make nest are - dead leaves, twigs, sticks, yarn, grass clipping, etc.
4]Barbets make there nests during February to April in India and December to September in Sri Lanka.
5]We can find birds nest in trees, bushes, ground, cliffs, balconies, etc..
E] 1. i. light weight
ii. smooth features
iii. enlarged breast bone
2. - - - - -
3. - - - - -
4.Migration of birds is the regular seasonal movement of birds. Eg- Songbirds, Crane.
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