Very nice work. You may want to study trees, roots, and wings but very pleasing to look at.

Feathers themselves are very flimsy is why I suggest a wing study to understand where the actual meat and bone are. And since they've crashed, the feathers could be more ruffled to reflect it. The lighting, shadows, and pose are very nice and well placed. It's just the eye is drawn to the feather tip to point out the inconsistencies towards actual wings.

Hope this helps. Overall a very fine piece of work~

ooh, ow... as a guy with a winged fursona, this is a little scary to me XD
that being said, this looks really good.