Experts and wildlife scientists are puzzled by the death of around 40 pelicans, including one on Saturday, at Kokkrebellur near Mandya. The deaths have taken place over the last few months.
Though scientists and veterinarians from premier institutes have attributed the deaths to nematode (round worm) infestation, caused by ingesting contaminated water and fish, questions are being raised as to why other birds – including the young ones of the pelicans – have not died, as they all share the same habitat and have similar foraging habits.
V. Yedukondalu, Deputy Conservator of Forests, said the actual cause of death has not been determined, but the presence of nematode might be contributing factor. He has sought the help of experts to resolve the issue.
Citing the report of a senior scientist from the Department of Conservation Biology, Salim Ali Centre for Ornithology and Natural History (SACON), Coimbatore, Mr. Yedukondalu said tests of faecal samples collected earlier have confirmed that the birds are infected with multiple species of the nematodes. Toxicological tests of the samples have ruled out death due to high toxicity, as pesticide, heavy metals, fertilisers were within permissible levels.
Assuming that some birds with weakened immunity system are more susceptible to the disease, the authorities have planned a multi-pronged approach. “Apart from de-worming the livestock in a radius of 30 km, we have to disinfect all the water bodies in the foraging range,” said the official.
There are nearly 150 pelican nests in Kokkrebellur, which supports a population of nearly 300 birds. This is the first time that as many as 40 birds have died in such a short span.
