Two things I like and three I don't. I think the contrast is good for black and white, a good range of tones, I like the subject matter, it is interesting. I don't really like the vignetting, it is too abrupt, maybe if it faded to the darker much more gradually...I would rather the second bird were also in focus, which would require a faster shutter speed, not always possible especially if you're getting lucky in catching a shot, but it would be awesome if it were in focus. Lastly, it would be more interesting composition wise if the pole were not perfectly centered, I can't decide if I'd like it better if it were to the right, so that the left bird is flying into the frame, or if it were on the left, so the right bird was looking into the frame. Probably with the wires on the left it would be better with the pole on the right, so more is filling the frame.