Army ants (Labidus praedator) are blind. Since they can’t see, they rely on pheromone trails to know where to go next ... of ants in the world. Only two species have been seen and recorded ...

Army ants (Labidus praedator) are blind. Since they can’t see, they rely on pheromone trails to know where to go next ... complete the round in about two hours and a half.” ...