Da-nana-na-na-nana~
I have the Shadow of the Colossus fight song in my head now. I regret nothing.
The tree/shrooms growing out of the back of these guys and the grassy fur is a really nice touch. Oh and the little guy in the corner - I hope he can climb pretty well or he's in for it. AIM FOR THE WEAK POINTS! :D
Anywhoo.
You got a good talent for concept art, my good man. Keep it up!