I love these guys, and you caught this one in a perfect hunting pose, with great HA and concentration. Beautifully sharp. I might consider removing the bits of fluff from the back and bill, but that's personal preference. A great shot.
Best you could have done from your position Don !!! ... as presented might just clone the one branch going through his read end !!!! Image is sharp well exposed and a good crop ration !!!
nice job, don!! tack sharp and good exposure. agree with the comments regarding the whites on the perch. if you want to get picky, you could clone out the stray white feather on it's back, too.