That is a precious "wing" flap! The vertical comp is a given for this pose. Lowish angle works well. The face seems a tad soft compared to the lower body, I'm sure a bit more sharpening there for web would work well.
Ian, That's just as cute a picture as I've ever seen. Love the tip toe pose and the tiny wings. Tricky light but you have his face so nicely lit. Agree on a bit more sharpening to finish it off. TFS