The little downy's eye looks almost bigger than he is - he does seem to have a rather pleading look on that face. May have gotten down on the ground and doesn't know how to get back to the tree??
Yep, he looks stressed all right and it's a shame that we can't help when we see a little bird in trouble....On the other hand maybe he is perfectly all right and is putting on an act? This little bird has great colors....