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Blue tiger butterflies migrate towards the Western Ghats
ஏன் செய்தியில்?
Millions of butterflies chase the North-East monsoon: the Western Ghats migration Prelims biodiversity questions can test
Blue tiger butterfly migration towards the Western Ghats marks the North-East monsoon onset.
Why it matters: factual, Prelims-type
What you need to know
2 நிமிடம்
Millions of blue tiger and dark blue tiger butterflies are moving towards the Western Ghats as the North-East monsoon sets in.
The annual migration is closely watched by naturalists.
ஆதாரங்கள்: Topper IAS editorial (PIB / The Hindu / Indian Express)
முக்கிய உண்மைகள்
Remember these
- Blue tiger and dark blue tiger butterflies are migrating towards the Western Ghats as the North-East monsoon sets in.
- The migration is annual and closely watched by naturalists.
- The Western Ghats are a UNESCO World Heritage Site and a global biodiversity hotspot.
- Blue tiger (Tirumala limniace) and dark blue tiger (Tirumala septentrionis) belong to the Nymphalidae family.
- Butterfly migration is seasonal and linked to monsoon rains and the availability of host plants.
ப்ரிலிம்ஸ் · மெயின்ஸ்
How the exam will ask it
ப்ரிலிம்ஸ்
- Statement: Blue tiger butterflies migrate towards the Western Ghats with the onset of the North-East monsoon. (Correct)
- Statement: The Western Ghats are recognised as one of the world's biodiversity hotspots. (Correct)
- Statement: Butterfly migration is unrelated to seasonal weather changes. (Incorrect)
மெயின்ஸ்
GS-III Biodiversity and Environment: seasonal insect migrations act as indicators of ecosystem health and climate shifts. Habitat loss and changing monsoon patterns threaten migratory corridors in the Western Ghats. Way forward: protect corridors and host plants, support citizen-science monitoring, and integrate climate-resilient habitat management.
Quick recall
Answer before you reveal
Blue tiger and dark blue tiger butterflies have begun their annual migration towards the Western Ghats, signalling the onset of which weather season?
- South-West monsoon
- Western Disturbances
- Mango showers
- North-East monsoon
விடையைக் காட்டு
விடை: D — Correct: North-East monsoon — Right: the migration is reported at the onset of the North-East monsoon. • South-West monsoon — Wrong: the South-West monsoon arrives in June; this migration is reported with the October onset of another monsoon. • Western Disturbances — Wrong: Western Disturbances bring winter rain to north-west India. • Mango showers — Wrong: mango showers are pre-monsoon showers of summer.
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