Igor Siwanowicz
(Source: google.com)
An ant mill is a phenomenon where a group of army ants separated from the main foraging party lose the pheromone track and begin to follow one another, forming a continuously rotating circle. The ants will eventually die of exhaustion.
Neil sent me a link on the Death’s head moth. These moths raid honey bee hives because they can move about unmolested on account of their ability to mimic the scent of the bees.