#6. "RE: Noise and Noise Reduction in Capture NX2" In response to In response to 5
One more thing that I was going to tell you if you are using a filter on your lens, take it off and see if you don't get a better picture.
Cropping to much will ruin a picture, that is why I said you need a 500-800mm lens for birds especially the small ones. If you can get one you might try teleconverter and see if it works for you. Maybe a 1.4X or 1.7X from Tamron or one of the others.