DAV Class 3 Science Chapter 7 Birds and Their Nests solutions from DAV textbook My Living World. Clear answers on bird flight features, bird nest types (weaver, tailor bird, woodpecker, penguin), bird migration, and care for winged friends with real textbook illustrations.
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Chapter Overview: Birds & Their Nests (Class 3 Science)
Birds are unique feathered creatures called aerial animals because they spend a significant amount of time flying in the sky. To lay eggs and raise their tiny babies safely from harsh weather and predators, birds build ingenious nests during spring and early summer.
A. Fill in the blanks.
1. The sparrow makes a nest between the branches of a tree.
Explanation: Sparrows also build nests on rooftops, almirahs, and ceiling corners in our homes.
2. Birds make nests to lay their eggs.
Explanation: Nests provide a warm, secure cradle where parent birds incubate eggs until they hatch into chicks.
3. In case of weaver bird it is the male who makes the nest.
Explanation: The male weaver bird weaves an elaborate hanging nest with grass; the female inspects and selects the best one.
4. Some animals, sometimes, break the nests of birds.
Explanation: Predators like cats, squirrels, and snakes attack nests to steal eggs and young chicks.
5. Birds protect their young ones from other animals.
Explanation: Parent birds fiercely guard, feed, and teach their chicks how to fly.
B. Write True or False for the following statements.
1. Different birds have different nesting habits. — True
Reason: Each bird species has its own style—weaver birds weave grass, tailor birds stitch leaves, woodpeckers drill holes, and penguins use stones.
2. A crow builds its nest on the ground. — False
Reason: A crow builds its nest high up on the topmost branches of tall trees or telephone poles using twigs and wires.
3. Beaks and claws help birds to catch their food. — True
Reason: Sharp curved talons and strong beaks enable birds to catch, hold, and eat insects, seeds, or fish.
4. The sunbird does not make any nest of its own. — False
Reason: The sunbird makes a lovely hanging nest from tiny bushes; it is the Koel (cuckoo) that does not build its own nest and lays eggs in a crow’s nest.
5. We should never break the nest of a bird. — True
Reason: Breaking nests kills fragile eggs and leaves baby chicks homeless and defenseless.
C. Tick the correct option.
1. Birds can fly because they have—
(a) hollow bones and wings
(b) heavy bodies
(c) big teeth
(d) long legs
Answer: (a) hollow bones and wings
Explanation: Air-filled hollow bones make their body lightweight, and feathered wings provide aerodynamic lift.
2. The bird that makes a tuk-tuk sound, while making its nest in a tree trunk, is—
(a) tailor bird
(b) barbet (coppersmith)
(c) pigeon
(d) crow
Answer: (b) barbet
Explanation: The barbet (or coppersmith) hammers tree bark with its chisel-like beak producing a rhythmic ‘tuk-tuk’ sound.
3. Birds are usually busy making nests during the month of—
(a) December
(b) January
(c) April
(d) November
Answer: (c) April
Explanation: Spring and early summer (April) offer pleasant weather and abundant food for rearing new chicks.
4. This bird uses stones and pebbles to make its nest.
(a) weaver bird
(b) eagle
(c) penguin
(d) parrot
Answer: (c) penguin
Explanation: In polar Antarctica where there are no trees or grass, penguins gather smooth pebbles to keep eggs off the ice.
5. This bird migrates to India during winters.
(a) crow
(b) Siberian crane
(c) sparrow
(d) peacock
Answer: (b) Siberian crane
Explanation: Siberian cranes fly thousands of kilometres from freezing Siberia to warm water sanctuaries in India every winter.
D. Answer the following questions in brief.
Question 1: Name three birds who work in pairs to make their nests.
Answer: Sparrow, Sunbird, and Dove work in pairs (male and female together) to build their nests.
Question 2: Why are birds called aerial animals?
Answer: Birds are called aerial animals because they have wings and stream-lined bodies that allow them to fly high and spend a large part of their daily life in the air.
Question 3: List some materials that are used by various birds to make their nests.
Answer: Birds use:
- Dry twigs, dry grass, and straw
- Leaves and plant fibres
- Cotton, animal fur, feathers, and spider webs
- Pieces of cloth, paper shreds, thread, and wires
- Pebbles and small stones (by penguins)
Question 4: When and where does a barbet make its nest?
Answer: A barbet (coppersmith) makes its nest during summer in the hollow cavities of tree trunks by pecking holes into the wood with its beak.
Question 5: List some places where we find birds’ nests.
Answer:
- High branches of tall trees
- Holes inside old tree trunks
- Top of domestic almirahs, ventilators, and behind air conditioners
- Meter rooms, old abandoned buildings, and street lamp poles
E. Answer the following questions.
Question 1: Write any three features of birds that help them to fly.
Answer:
- 1. Hollow Bones & Light Body: Birds have hollow, air-filled bones and a streamlined, boat-shaped body that reduces air resistance.
- 2. Wings & Flight Feathers: Their forelimbs are modified into strong wings covered with lightweight feathers that push air downward.
- 3. Strong Flight Muscles: Powerful chest muscles flap wings continuously without tiring quickly.
Question 2: How are nests useful for birds?
Answer: Nests are useful to birds in several critical ways:
- They provide a safe, warm place for mother birds to lay and incubate eggs.
- They protect tiny, featherless newborn chicks from rain, harsh sunlight, storms, and winter winds.
- They keep baby birds hidden and safe from predators such as cats, snakes, rats, and hawks until they learn to fly.
Question 3: How does a tailor bird make its nest?
Answer: A tailor bird uses its sharp, needle-like beak to puncture neat holes along the edges of two large broad leaves. Then, it uses strong plant fibres, spider silk, or pieces of cotton thread like a sewing needle to stitch the leaves together into a cozy pouch. Inside, it cushions the bottom with soft cotton, down feathers, and dry grass to lay eggs.
Question 4: What do you mean by migration of birds? Name any two migratory birds.
Answer: Migration is the seasonal long-distance journey undertaken by birds every year from freezing, harsh regions to warmer lands in search of food, pleasant climate, and safe nesting grounds.
Two famous migratory birds that visit India during winters are:
- Siberian Crane (flies from cold Siberia to Bharatpur Bird Sanctuary)
- Flamingo (migrates to coastal wetlands of Gujarat and Mumbai)
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