Board Thread:Warhammer 40k General Discussion/@comment-7186329-20130329164207/@comment-26355556-20150506170355

Nope it says right here: Over time, as the Hive Fleets pressed ever deeper into the galaxy, their victories were much harder won as their enemies began to concentrate on destroying the swarm from great distance. In response, the pragmatic Hive Mind recognised the need for a bioform that could neutralise the enemy's long-range weaponry, thus leading to the birth of the Biovore. Imperial savants believe that the Hive Mind may have made use of Orkoid genetic material to create the Biovore. Thus this creature is not merely a powerful weapon in the Hive Mind's arsenal, it is living proof of the adaptive nature of the Tyranid menace.