Crafty, or hiveminded like nearly every other biohorror. As long as one of the group survived, that particular hivemind would learn, and if any of the group made it off planet and out of reality, its findings would be used to improve the future strains. That was the reason for the Death Guard's tendency to overkill a situation with biohorrors. An improvement to one group didn't stay there, and worse, sometimes it showed up in completely different strains.<br/><br/>Still, the sensor ship could track them for the better part of the continent, and with the transports sweeping around faster than they could run, it would be over here soon. Ish.<br/><br/>At least until the first Crawler decided to burrow to ditch the sensors, causing every Death Guard to facepalm. What would have been difficult but simple just got infinitely harder. The things had to dig a good ways down to completely avoid the sensors, but now general sweeps would have a chance of missing them.<br/><br/>Ranarc, however, just rolled his eyes, and went back to sleep. The field commanders had their orders, the sensor ship knew about where the Crawlers were, so now it was a game of hunting them down and exterminating them like the roaches they were.