Bird census at Thol, Nalsarovar

Ahmedabad: A two-day bird census is all set to commence at Thol and Nalsarovar from Saturday. Around 150 volunteers together with forest department officials will take part in the biennial event, which aims to know the variations in the number of migratory birds, as well as changes in their habitats and migration routes.

Close to 200 different species of birds visit Nalsarovar and Thol every year. Every winter, about 1.5 lakh birds stay at Nalsarovar and up to 50,000 birds stay at Thol. However, due to geographical factors such as weather, habitat and food availability, the number of birds visiting the lakes fluctuates from one day to the next. “We have created zones for the census of migratory birds in Nalsarovar and Thol lakes,” says Dr Brijesh Chaudhary, District Forest Officer (DFO) of Nalsarovar. The lake is divided into 50 zones while Thol is separated into 15 zones.

A bird census was conducted in both the lakes in 2018. This year, around 150 volunteers will use binoculars and telescopes to count the birds.

Chaudhary adds, “This year, the number of coots at Nalsarovar and the number of bar-headed geese at Thol are higher than usual. Regular counting of birds of this type can show the number of fluctuations and their causes.”

A report will be prepared a week after the completion of the bird census.