Chapter 16: A Busy Month (Bird Nests & Animal Teeth)
चूूँ-चूँ करती आई चिड़िया (गिजुभाई बधेका, पक्षियों के घोंसले एवं दाँत)
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- Author: Gijubhai Badheka lived in Gujarat; wrote many humorous letters and inspiring stories for children about nature and birds.
- Indian Robin (कलचिड़ी): Builds its nest at ground level among rocks using grass, soft twigs, roots, wool, hair, and cotton wool; eggs are laid in this soft bed.
- Crow (कौआ): Builds its nest high up on tree branches using all kinds of materials including pieces of wire and wood; its nest is rough.
- Koel (कोयल): Sweet singing bird that never builds its own nest; lays its eggs in the crow's nest, and the crow hatches them along with its own eggs.
- Dove (फाख्ता): Makes its nest among the thorns of a cactus plant or in a Mehendi hedge.
- Sparrow & Pigeon: Build nests in old, deserted houses, behind photo frames, on ventilators, and in cupboard tops.
- Barbet / Coppersmith Bird (बसंत गौरी): Makes a 'tuk-tuk-tuk' sound in summer; pecks a deep hole inside a tree trunk to lay its eggs.
- Tailorbird (दर्जिन चिड़िया): Uses its sharp beak to stitch together two leaves on a bush and lays eggs inside the folded leaf pouch.
- Sunbird (शकरखोरा): Makes a nest that hangs from the branch of a small tree or bush; nest contains hair, grass, thin twigs, dry leaves, and cobwebs.
- Weaver Bird (बया): The MALE weaver bird weaves beautiful intricate nests; the female inspects all the nests and chooses the one she likes best to lay her eggs.
- Animal Teeth Adaptations: Cows have short flat front teeth for snipping grass and large flat side teeth for chewing cud; Cats have sharp pointed teeth for tearing meat; Snakes have curved sharp teeth but swallow prey whole; Squirrels' front teeth keep growing throughout their life, so they continuously gnaw to wear them down.
- Trap: CBSE asks which bird stitches leaves together. Correct: TAILORBIRD (दर्जिन चिड़िया).
- Trap: CBSE asks which bird's male weaves nests and female selects. Correct: WEAVER BIRD (बया).
- Trap: CBSE asks which animal's teeth grow throughout life. Correct: SQUIRREL (गिलहरी), not rat or rabbit.
- Trap: CBSE asks where the Indian Robin nests. Correct: In spaces between rocks with grass, hair, and cotton (not high in trees).
NCERT Core Facts: Gijubhai Badheka's Avian Architecture & Dental Adaptations
Class 4 Chapter 16 is one of the top 3 highest-frequency chapters across CTET Paper 1 history.
1. Master Matrix of Bird Nests
| Bird Name | Nesting Site | Construction Materials & Unique Habits |
|---|---|---|
| Indian Robin (कलचिड़ी) | Low spaces between rocks | Soft grass, roots, wool, hair, and cotton wool; extremely soft interior. |
| Crow (कौआ) | High up in tall trees | Rough twigs and pieces of wire and metal. |
| Koel (कोयल) | Does NOT build a nest | Lays eggs secretly in crow's nest; crow raises them. |
| Dove (फाख्ता) | Thorns of cactus or Mehendi hedge | Small twigs and grass. |
| Barbet (बसंत गौरी) | Hole inside tree trunk | Pecks deep cavities with sharp beak; calls tuk-tuk-tuk. |
| Tailorbird (दर्जिन चिड़िया) | Stitched leaves on a bush | Uses needle-sharp beak to stitch two leaves together. |
| Sunbird (शकरखोरा) | Hangs from branches | Hanging pouch made of hair, grass, bark, and cobwebs. |
| Weaver Bird (बया) | Hanging woven basket | MALE weaves nests; female chooses the finest one! |
2. Animal Dental Adaptations Matrix
- Cow: Short front incisors for snipping grass; broad flat molars on sides for chewing cud.
- Cat & Dog: Sharp, pointed canine teeth engineered for tearing flesh.
- Snake: Possesses sharp curved fangs, but never chews; it swallows prey completely whole.
- Squirrel: Its front incisor teeth continue growing throughout its lifetime. To keep them trimmed, the squirrel must constantly gnaw on nuts, bark, and seeds.
Test Your Mastery: A Busy Month (Bird Nests & Animal Teeth)
Authentic CBSE exam questions tested directly from this NCERT chapter.
Which bird stitches together two leaves of a bush using its sharp beak to make its nest?
कौन सा पक्षी अपनी नुकीली चोंच से झाड़ी के दो पत्तों को सीकर अपना घोंसला बनाता है?
In which of the following bird species does the male build several beautiful woven nests, and the female inspects and chooses the best one to lay her eggs?
निम्नलिखित में से किस पक्षी की प्रजाति में नर कई सुंदर बुने हुए घोंसले बनाता है, और मादा उनका निरीक्षण करके अंडे देने के लिए सबसे अच्छा घोंसला चुनती है?
A child observes that an animal's front teeth keep growing throughout its life and it must gnaw on things to prevent them from becoming too long. The animal is a:
एक बच्चा देखता है कि एक जानवर के आगे के दाँत जीवन भर बढ़ते रहते हैं और उन्हें बहुत लंबा होने से रोकने के लिए उसे चीजों को कुतरना पड़ता है। वह जानवर है:
Which bird weaves multiple nests for the female to choose from?
The male Weaver Bird (Baya) weaves intricate hanging nests, and the female inspects and selects the best one.
Why do squirrels constantly gnaw on hard objects?
Because their front teeth continue to grow throughout their life; gnawing keeps them worn down to a manageable size.
Which bird builds its nest between rocks using hair and cotton wool?
The Indian Robin (Kalchidi).