Thousands of migratory birds of hundreds of different species have come to the Okhla bird sanctuary this year due to a longish cold spell in European countries.
According to officials, every year over a 100 migratory bird species arrive here.
Common hoopoe, kingfisher, painted stork, white ibis, great egret, cattle egret, red vented bulbul, spotted owlet, bank mynah, and several local specie