Looks like the lighting was very harsh on this particular day which can be a nightmare when trying to get top quality results. I really like the way you have framed both birds in this photo, but you seem to be lacking in the focus department. The foreground and BG are blurred which is normal operation for this lens, but the birds (especially the one on the right)are pretty soft as well. Were you hand holding your camera or using a tripod? The Canon 70D is a great body and I am assuming your lens is either a Canon 100-400MM or a straight 400MM.