Visitors to Tamil Nadu’s Dhanushkodi beach were treated by an unexpected sight a few days ago. Thousands of crimson rose butterflies swarmed the crown flower (erukkam poo in Tamil) for the nectar in them. These butterflies gave the blue Dhanushkodi a red tinge thanks to their colourful wings.

from Times of India https://timesofindia.indiatimes.com/city/chennai/crimson-rose-butterflies-migrating-to-sri-lanka-give-a-red-tinge-to-dhanushkoti/articleshow/89660179.cms