alleryWhich natural thread do hummingbirds use to bind their nests?
ASpider silk
BSilkworm cocoon
CCotton thread
DPlant roots
Answer & Solution
Correct answer: A. Spider silk
1. Cup nests need a light, strong, stretchy binder.
2. Many hummingbirds use spider silk.
3. It lets the nest mould to the parent and stretch for growing chicks.
_Source: Wikipedia, Bird nest, Cup_
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