During the birding trip (Feb, 2020) at the Teesta Barrage, Gajoldoba (Jalpaiguri, West Bengal) I have found many variety of migratory ducks and raptors. Here it is a rare vagrant from the Boreal wetlands of Taiga Biome (Scandinavia, the Baltic States, and northern Russia). This is a female Common Goldeneye. It is very shy diving duck and it does not allow a close approach So, I have to manage a very distant shot from the boat (heavily cropped image).
Nikon D500, Nikkor 200-500 mm
500 mm, f/6.3, 1/1250s, iso 400