Vesper Reference Sheet (WIP)

I reeeeeaaaally need to improve my drawings, and I guess doing reference sheets would be a good way to start. Going to post WIPs to hopefully make myself finish the thing and not just leave it like this. Please excuse the abundant and messy handwriting, the final will be neater I promise  

Any advice for drawing dragons would be heartily appreciated!  

Areas of weakness: FEET, wings
(Areas of laziness: tail. Sorry it looks awful right now, I'll fix it!)