Aralam Wild Life Sanctuary, one of the most precious evergreen forests in the state, is witnessing the breath-taking annual migration of butterflies from the Coorg hills. The wintering butterflies, mostly of Albatross species, breeze by the rivulets in the forests like gentle patch of yellow clouds, making their way to Nilambur forests and to Silent Valley, apparently guided by an unknown collective memory passed on to generations.

The amazing migration of the butterflies is better seen in the morning and when the sun gets hot by noon, they stop moving. As many as 40,000 Common Albatross butterflies can be seen in a single flock in the morning, says V C Balakrishnan of Malabar Natural History Society (MNHS) and a regular visitor at Aralam during this season. The Great Orange Tip, Lesser Gull and Plain Pussin butterflies can also be seen following the Albatross migration, he said. Many varieties of butterflies of Daniane sub species were seen congregating in the Aralam Sanctuary in the season. Lakhs of butterflies roosting on trees in the forests is a sight of a lifetime, Balakrishnan said.

Experts say that the butterfly migration through this stretch of Western Ghats is known to start from the evergreen forests in Coorg where these butterflies generally lay eggs on a particular tree locally known as Choota Maram or Asthi Maram (Drypetes Venusta). The butterflies fly through Aralam to Nilambur and to Silent Valley forests. “However, not much is known about when these butterflies would return to Coorg,” Balakrishnan said.

A group of nature lovers and butterfly enthusiasts would annually visit the sanctuary to witness the wonderful natural phenomenon every January. The Kerala Forests and Wildlife Department conducts joint explorations with MNHS during the season to survey butterflies. Many new species have been identified during these explorations. “We have been regularly conducting butterfly surveys during the season for the past eight years,” said Harikrishnan Nair, Wildlife Warden, Aralam Wildlife Sanctuary.

A total of 242 species of butterflies were spotted at Aralam, the highest among the forests in the state. This makes a big share of the total of 320 butterfly species found in the entire state. “The thick evergreen forests and the rich diverse flora at Aralam make perfect home for the butterflies. However, the maximum number of butterfly species is recorded here because we conduct regular surveys and scientifically categorise it,” the Wildlife Warden explains.

source: http://www.newindianexpress.com / The New Indian Express / Home> States> Kerala / by Express News Service – Kannur / January 13th, 2014