It was said on the warpshadow topics that this beast didn't look tyranid enough. I have decided to add a few tyranid scales on the head and claws, and to rework the head. I will later add scales on the legs, tyranid carnifex talons near the hands and gaunt talons on the toes. The eyes will be split in two to show enhanced senses.
Pictures of the new head, tail and claw.