Butterflies are migrating early in southern India this year

In a departure from the past, the annual migration of butterflies from the hill ranges of the Eastern Ghats towards the Western Ghats is an early phenomenon this year. 

Usually, butterfly migration in south India begins in October-November, with the onset of the northeast monsoon, from the plains to the Ghats, and in April-June, just before the advent of the southwest monsoon, from the Ghats to the plains.

The southwest monsoon is the season for the breeding of butterflies, especially milkweed butterflies, in plains of south India, after which they migrate. 

But this year, the first migratory sighting was recorded in the Parambikulam Tiger Reserve in Palakkad district by forest watchers on July 14. Later, butterfly enthusiasts in Salem, Erode, Tiruppur, Coimbatore and the Nilgiris observed their movement in large numbers from August 21, which is still continuing. Butterfly migration has also been recorded in Mysuru, Bengaluru, Kolar and Coorg districts in Karnataka.