i love #17 and #18
the 2 things i would want to see are:
1) the beak is too "smooth" - check out the raven software logo i uploaded and its not "jaggy", but its more pronounced where it changes direction...do you know what i mean?
2) if the eye/he could look even a little meaner
3) i like how you added more wing. could you make it look more like a "bicep" like hes a big ass strong birs and put less white in it. i find my eye being drawn to that top part of the wing that has more white accent in it then the rest of the bird.
im really liking it!