Butterfly migration coincides with North-East monsoon in Tamil Nadu
Butterfly migration coincides with North-East monsoon in Tamil Nadu
IN · Published Oct 22, 2026
• The annual migration of blue tiger and dark blue tiger butterflies is underway, coinciding with the onset of the North-East monsoon in Tamil Nadu.
• These butterflies are moving from the Eastern Ghats to the Western Ghats, escaping heavy rains in Chennai and surrounding districts.

Impact & Risks

The migration highlights the ecological importance of butterflies as indicators of a healthy ecosystem. However, urbanisation and lack of awareness may hinder the documentation and understanding of this phenomenon. The butterflies' journey is vital for their survival, as they escape adverse weather conditions and contribute to the food chain at various stages of their life cycle. Observers and researchers play a crucial role in collecting data to support conservation efforts.

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