Went and sat at the park this morning for a little while and got a few nice chances for some shooting....couldn't stay all day as I had a wive's b-day to tend to....
You have some nice shots here, good eye contact in most of them. You may want to number them in the future, makes it easier to comment on them. I like the second to last the best, nice clear shot.
Wow, cardinals, grosbeaks and finches! And then you surprise me with a Hummer Nice treat there I can't quite put my finger on it but some of these seem to have too much contrast or saturation. Now a few look very well to me as in #5,7,8,10. #5 could work better with a vertical crop to lessen the brighter wood behind it taking away from the softer color in this female cardinal. Be careful when you crop to not crowd the bird, and to leave more room in the direction the bird is looking.
Hope this helps a bit, sorry to have missed other posts that went un-commented on, shame on me............ Sure looks like you are on the right track, sometimes it is a matter of learning to get the nice shots on your computer to the web and keep them looking nice with any conversions needed.
Keep posting, will be here to leave feedback............
Karl
I went and made some changes to the images that you "passed" on , and redid a couple crops on them as well. The contrast was due to my adjusting the D-lighting HS, I removed those changes. All that remains in these images is one notch of sharpening.
And since you like the hummers....here's another shot from a second chance at them today. this guy wanted to sit alot today....
Great variety!! I agree that some need a little rework on PP and what you did to the Hummer is an improvement. Looks to me your photos are pretty good, it's your Post Processing that needs some work. Keep at it > You are well on your way !!
Nice treat there 
I can't quite put my finger on it but some of these seem to have too much contrast or saturation. Now a few look very well to me as in #5,7,8,10. #5 could work better with a vertical crop to lessen the brighter wood behind it taking away from the softer color in this female cardinal. Be careful when you crop to not crowd the bird, and to leave more room in the direction the bird is looking.