With the onset of winter, birds from Siberia and other parts of Europe have started arriving in large numbers at the Sultanpur National Park in Gurgaon.
This is an annual phenomenon when the lakes and mountains in Siberia get covered with snow and the birds flock to India in search of food. Apart from greenery and water, they also like the salty lake soil.
According to wildlife officials, every year they float fish seeds of species such as Rahu, Katla, Murathee and Mirgal, which are ideal feed for the winged guests.
Birdwatchers also come in large numbers to see the flock of grey leg goose, pintail, whistling teal, gadwall and other species. The flying visitors come during the night to avoid falling prey to bigger birds. They do not forget their directions when returning home six months later.
The Sultanpur Lake is spread across 250 acres with an average depth of 1.5 feet. The annual average water congregation here is about 100 acres.