Hey, got some crits for you! :o Note that I'm not an expert or anything, so maybe my advices aren't that great.
I didn't make any edit for your first image, but just know that you have 62 colors in there. I can see 7-8 of them when not zooming, you might want to fix that. Just try to go with less colors and more contrast, basically, and I'm sure your image will be a lot nicer to look at.
Okay, now for the sprite I made an edit for:
1/ Well, your version. :p
2/ Okay, first thing I edited here was the lines and some shading. I got rid of some colors for now, more colors were not needed yet.
3/ Changing colors, adding shading on beak.
4/ Getting rid of some black lines in the sprite, adding shading at the bottom.
5/ Finally, adding some highlights.
'Hope this helps!
