This might occur when the lead ant encounters an obstacle and has to turn around. The lead ant, not knowing they are in the lead, now begins following the trail of the others.

The ants movement he suggests could mean that the trails have become ”looped around themselves”, causing them to form a circle. Others have suggested that the strange behaviour could simply be ...

Why would an ant walk in an endless circle until it dies of starvation and exhaustion? Known as an ant death spiral, or circular milling, this deadly phenomenon can cause hundreds of ants to ...