Colony of ants

After walking for around ten minutes, Bai Zemin could not help but frown slightly as he led the rest. They had been walking for at least a kilometer and a half at a brisk pace from the point of view of an unevolved human, keeping their guard up at all times, but so far they had not even seen a single ant or any other species of enemy.

Had all the ants died? Or maybe there was no one at home?

Just as such thoughts were going through his head and Bai Zemin was turning the corner as all that lay ahead was a wall of stone and earth, his steps stopped dead in their tracks as he found the answer right before his eyes.