warning coloration
The border color is a protective color that threatens the enemy with intentional coloring, and warns that if it is eaten, both the predator and the prey will be harmful. For example, the red trunk of a ladybug is noticeable on plant leaves, which threatens insect-eating birds. Because birds know from experience that ladybugs have yellow, unpleasant fluids. Due to the influence of prey plants in the caterpillar period, King Nabi, who is poisoned in his body, threatens his enemies with colorful patterns. Depending on the nature of the enemy, the border can not help to escape the danger, and in the case of ladybugs, it may be eaten by a natural spider, acupuncture or wart. However, birds have a borderline effect, so ladybugs account for a very small percentage of insects eaten by birds. There are other creatures who have been criticizing creatures with borderline color even though they are not a threat to predators.