Feeling itchy yet?
Fire ants are blind. They navigate by following the pheromone trail left by other ants. If the ants get confused and start traveling in a circle, they form what's called an ant mill, where they keep on marching in a circle until they die.
Individually, they aren't dangerous,
but get them in a group...
Now I'm itchy.
Army ant photos by Alexander Wild>>
Anton by Penultimate Straw, B3ta>>