This is a really nice piece that looks well put together and uses some very nice tools.
I really like the background you have created with the roof and the shingles. I see that you've used the lines of the shingles as leading lines to draw the eye to Starly, and this works very well in this piece. I like the way that you've drawn the shingles from the reference, as it looks very similar and well done. All of your lines are clean and very well executed too. I would have loved to have seen Starly in a more dynamic position/ pose though, as well as I would have loved to have seen more detail in the background.
Colours / Shading
I like the colours in this and there really isn't much to complain about here, other than the hue of the roof just looks pinky. I don't know if you were going for a pink/purple roof, but it just looks odd to me. The shading is very well done here, with nice highlights and lowlights on the shingles and Starly. You gave us a clear direction that the light is coming from, which is very nice to see. I'd just have to critique that you missed some of the spots that could have been shaded.
Starly looks pretty good here, a little skinny around the neck and long at the beak though, but that doesn't really matter all that much.
In the end this is a pretty good piece that encompasses and reaches beyond what it needs for a pass. You get a 50 on this piece! Enjoy your little birdy now!