Space Marine 2

The wave was made of organisms, a swarm of fast-moving black and white creatures. They came on in a rippling, scurrying tide, chittering and yapping. Organic armour glinted like lacquered steel in the sunlight. The organisms were man-sized bipeds with torsos and heads hunched low and forward like sprinters, and rigid, spike tails held out high to counterbalance them. Their limbs and bellies gleamed off- white, like dirty ice, but their backs and long heads were a polished onyx black where the armour was thickest. Dead black eyes, mere slits, gazed out from behind heavy nasal horns.