Early Migration of Butterflies
Part of: GS Prelims and GS-III- Biodiversity; Climate change
- The annual migration of butterflies from the hill ranges of the Eastern Ghats towards the Western Ghats has been observed earlier in 2020 (in the months of July and August).
- Usually, these butterflies breed during the southwest monsoon season on the eastern areas of South India and their progeny migrate back to the Western Ghats in October- November.
- The Eastern Ghats complex of the Yercaud hills (Shevaroy hills), Pachamalai, Kolli hills, Kalvarayan are major originating places for the migrating species.
- Possible Reasons for Early Migration: Change in rainfall pattern, a considerable increase in the number of sunny days and a population outburst of butterflies.
Do you know?
- Four species of milkweed butterflies belonging to the Danainae subfamily are mainly involved in the migration — the Dark Blue Tiger, Blue Tiger, Common Crow and the Double-branded (commonly known as tigers and crows).
- The Ferns Nature Conservation Society (FNCS) initiated a citizen science project in 2018 to study the migration ecology of milkweed butterflies in south India,
Important value additions
- Butterflies are insects from the order Lepidoptera of phylum Arthropoda which also includes moths.
- Adult butterflies have large, often brightly coloured wings, and conspicuous, fluttering flight.
- Abundance of butterflies in any area represents the rich biodiversity.