In the image above, although it is difficult to see, there is a small ant at the bottom left side of the circle. An ant is depicted in this photo because it is a good example of altruistic behavior. Altruistic behavior is an animal behavior in which the animal itself is at a disadvantage, but benefits others of the species. Ants have the ability to kill themselves by exploding a gland in their body. The gland secretes a substance that protects the colony from invaders, so the individual sacrifices itself for the good of its colonies.