Kolkata: Two draft birds counting on Santragachhi Jheel, three separate days, have recorded a significant variance of 6,551 on Saturday to 5,792 on Tuesday, showing that winged guests can leave their favorite winter because of the sudden increase in temperature.
The rain on Tuesday night could produce temperatures in temperature if the sky cleared on Friday and seducing the flock of sheep again before the official bird counted on Santragachhi on Saturday.
Or if the rain continues, it can cause scattering of birds, forcing them to take refuge in a place to find food at AMTA, Bagnan and Uluberia than returning to their perch place in Jheel.
TOI has been in November-end reported how the number of birds in various low migration spots this year, especially because of the rain which continues until the end of this year.
Cyclone, especially Jawad in early December, also affected the pattern of bird migration.
“Lower whistling ducks usually arrive in a considerable amount in Santragachhi Jheel about 1.5 to 2 months after they hatch chicks.
Birds waiting for chicks to be large enough to do flights that can range from 50 km to 500 km.
This year, due to heavy rains, the normal mating season in July has been postponed, thus disrupting their migration, “said Habitat Conservationist Arjan Basu Roy who retained Jheel.
Another reason why birds can leave Jheel is a change in land looking for a nearby eating.
With development activities in the recent HOWRA district, the night scene has changed.
There is light even near the farm at night.
It can push birds to hunt for land to find other meals and then take a place perched nearby, he explained.
Bird diversity is also lower than usual.
North Pintail, Gadwall, Pochard Ferruginous and other bird species are almost not seen this year.