Here are a couple more of the shots that I took the other day testing out the D7100. I'm woefully out of practice for BIF shooting and didn't do too well on the terns. But that is why they are good practice
But I do think there is a problem with the camera after its repairs. I don't remember it clipping wings as badly before
Nikon 80-400mm AF-S @ 400mm
Nikon 80-400mm AF-S @ 310mm
Nikon 500mm VR
And a couple of static shots to take user error out of the equation.
Nikon 80-400mm AF-S @ 400mm
Nikon 500mm VR