Altruistic behavior is the unselfish concern for the welfare of others. This is not really common in most animals, except for humans. One species of animals that perform altruistic behavior are bees. When a bee or their hive is harmed, all the bees will go after the person or animal that attacked or accidentally harmed it. Since this is a unselfish behavior, and the bees do seem to care for each other, this is an altruistic behavior.