um... the white reflection in it's eye looks more like an odd growth?
other than that, it doesn't look bad. you're really not going to improve by drawing simple images like this. you have to push yourself
EDIT: that's my point. if you're only good at one thing, you're not going to become a better artist by only doing that one thing over and over again. try using a photo reference and making a landscape as accurate as possible. trust me, it will work wonders, so long as you don't quit halfway.