A serpent eagle at Kaziranga, Assam.
I think I used a tamron 200-400 mm lens at full extension to take this pic. (I was at Kaziranga earlier this year - check out the pics in the wildlife category). Then I cropped the picture to get the bird full frame. Never really expected to get even this result - bird almost merged with the brown background, low light. But it was the first day of the trip into the sanctuary and I could not resist exposing a few frames. Glad I did it.