Board Thread:Warhammer 40k General Discussion/@comment-6589306-20130228113457/@comment-6078851-20140204023727

yeah, the xeno's do gain a characteristic or two from their host but for every advantage xeno reproduction has tyranid reproduction stomps it into the ground. even a planetful of queens would be effectively useless against just one tyranid brood-ship - xeno's need live hosts for every single egg, tyranids only need organic matter and it doesn't have to be alive.

xenomorphs are the original template for such a sci-fi species and tyranids are GW's manufactorum-on-steroids version :)