That a neat mini, but I want to bring something up. Please don't take this as a criticism of your painting, just something I want to say. I notice a lot of people thnat paint the Kroot paint their beaks the same way as the skin, like you're doing. But the thing is, they're BEAKS. I've never seen a bird besides crows or ravens that have beaks the same colors as their feathers or skin, they almost always stand out. It would really stand out if yuo painted the beaks differently than the rest of the Kroot. Ok, out of wind now, for a change. bye.
im not too knowledgeable on the gw universe, so i've never heard of this creature in 40k, but this is a great piece! the skin tone of the kroll is good, and i especially like the positioning of the marine. my only (constructive) criticism would be to bring out the hightlights on the marine (he seems rather flat) and smooth the blending on the flaps of the wings. But otherwise, great job!