Amphan carries hundreds of oceanic birds into mainland Bengal; frigatebirds dying of exhaustion and hunger
Bird watchers and scientists say that it is rare for these Oceanic birds to venture deep into the mainland.Updated: May 29, 2020 15:25 IST
Pelagic birds that spend most of their life in oceans and move towards coasts only to breed have been sighted by the hundreds for the first time in the southern districts of West Bengal after cyclone Amphan battered the region on May 20, bird watchers said.
Amphan, which hit the Sunderbans coast at a speed of 155-165 kmph, carried the birds deep into the mainland with its sheer force, experts said.
The sightings have been recorded by some scientists from the Zoological Survey of India (ZSI) and birders in Kolkata, South 24 Parganas, North 24 Parganas, Howrah and Hooghly districts.
Among the pelagic birds sighted are different types of frigatebirds such as the greater, lesser and Christmas frigatebird, Wilson’s storm petrel, sooty tern, lesser crested tern, great crested tern, brown noddy and short-tailed shearwater.
“While terns of some varieties can be spotted in coastal areas where they even feed on freshwater fish, frigatebirds of so many types are never seen in mainland Bengal. Some may not survive the exhaustion and hunger. They cannot find food,” said G Maheswaran, scientist and ornithologist at ZSI. “Some of my colleagues have photographed these frigatebirds,” he added.
“Frigatebirds can survive only in oceans where they dive deep to catch fish. The cyclone surely killed and maimed many of these birds. Had the cyclone hit the coast during the movement of migratory birds from central and south Asia, the devastation would have been severe,” Maheswaran added.
A couple of the birds sighted last week were seen in the past but only in small numbers. According to a research paper published in Indian Birds, the short-tailed shearwater, for example, was recorded for the first time in India in 2013 at Namkhana in the South 24 Parganas.
“While the terns and shearwaters have moved towards the ocean, the frigatebirds are caught in different districts. There are reports of some found by villagers in critical condition. We are preparing reports by crosschecking information with birders in different districts and consulting experts,” said Sujan Chatterjee, secretary of the West Bengal-based Birdwatchers’ Society. “Restriction on movement during lockdown and disruption in telecommunication have made the job difficult,” he added.
A data reviewer for e-Bird in West Bengal, birder Sandip Das said, “For the first time, greater frigatebirds have been spotted at New Town in the eastern fringes of Kolkata. I photographed a few near Bally bridge. Some have been spotted in Hooghly district as well.” Bally bridge connects Kolkata to Howrah.
Swarup Saha, an ardent birder at Batanagar in South 24 Parganas district, visited the local river jetty with his camera on the morning of May 21. “There were a few hundred terns of different types. I could not believe my eyes. The flocks were moving towards the coastline. I spotted around 30 roseate terns among 300-odd bridled terns,” said Saha.
“There have been many cyclones but Amphan was a different experience. Pelagic birds found at Lakshadweep or around the western coast of India have been seen in Bengal for the first time. A fellow birder spotted a Wilson’s storm petrel right here at the Kolkata riverfront. It was beyond imagination,” said Sandeep Biswas, a birder from Dum Dum in the north-eastern fringes of Kolkata.