How great to get such a clean, lovely portrait of this Thrasher, Joe. Typically they are so skulky and hard to get out in the open. I like your comp, the details, and the sharpness. I see about 3 or 4 dust bunnies you might want to remove, in the blue sky, including one very close to his bill.
Terrific, clean shot of this handsome fellow. Nice pose, showing his long tail to advantage. Good light an detail. I wouldn't mind seeing the blue spot go away, but it doesn't really hurt the fine image. I saw one of these guys skulking yesterday, but couldn't get a shot.
I love the bird's alert pose, the perch, colours. The eye looks great! I'd have preferred you flip the camera for a vertical but I do realize that in the spur of the moment it is not always possible. Too bad about the oof colouring at the wingtips...I'd try to selectively play with the color balance on it to match the surrounding plumage colour.