First, this is a beautiful image that has a LOT of potential! The position of the birds and interaction is very nice.
If when asking for critique you would post a jpg rather than an .html file it would be much easier for members to respond. That way we could see what works best for the image. Also, are you shooting raw and if so, what raw processing s/w are you using?
Without the above information, I would say that the image is reasonably sharp and very interesting and has great potential!
If this is a raw image, have you already done some processing on it? With the back lighting I would have applied some negative exposure compensation in camera. Easy to do since you can see the histogram in the viewfinder and the results of the exposure comp in the viewfinder also. The shutter speed is very fast, which sent the ISO higher. Have you applied any NR that may be impacting the sharpness of fine details?
So I would start with lowering the exposure. Then setting a black point and white point. This would bring back the contrast of the white and blacks in the image which are not present in this version. Just these adjustments might do a lot to enhance the image. Then deal with ISO noise and sharpness.