Not bad, but I think the sketch is better than the coloured version. You seem to have lost detail when you coloured it, particularly in the breast scales and the shading. I'm not sure that your colour choices go together very well either, they seem to clash a bit.
If I were you, I'd rethink the colour scheme and replace (or enhance) the large blocks of brightly lit texture with more subtle, gradiated shading.
If I were you, I'd rethink the colour scheme and replace (or enhance) the large blocks of brightly lit texture with more subtle, gradiated shading.