I've noticed you've been using lines of highlight that work a little bit like lineart, like how it goes through the right wing, next to the head.
It gives an interesting effect to it, although the green ones on the left side of the body seem a little odd as in color? I dunno.
Well that's the little feedback I can see, He really pops out of the background nicely also feeling part of it with the light, an amazing work once again Haychel! specially being a a 30 min. speedpaint! Wow.
Ah, in this lil time constraint, it is not really necessary to look at the little details. The green line there is picked up using the colorpick tool and the main function there is simply separating the wing with the tail / body. Simply put, for clarity of the form~
That being said, that's only how I work with speedpaints, I focus more on clarity and how the colors work together, not so much on details and how the lines look, especially when I only have 30 minutes to spend on it~