Nice Ray! How lucky they owl just flew in when you needed a subject. Focus looks a touch sharper to me in #2 and #3, so I prefer those two...
The only notable deficiency is the chromatic aberration and purple fringing visible, which is of course common when shooting leaves and branches against the bright sky (especially with some older lenses). Luckily, neither the subject nor the background contain cyan (the prominent CA color I see) or purple. You can use your processing software to desaturate these colors, and probably darken them somewhat to match the surrounding bark/leaves/feathers in tone as well... I've had very good luck with this sort of CA removal, though if I have a subject with colors matching the undesired one (ie. PF present, but also purple flowers), the work becomes much harder.
Here's #2 with a quick and dirty CA removal (if it bothers you that I edited and reposted the shot, please let me know and I'll take it right down)...