Possible explanations include higher fecundity that may be aided by aposematic coloration. The warning color display is called aposematic coloration. Prominent sexual dimorphism, bright aposematic coloration and mimicry complexes are widespread. To test the aposematic coloration on birds, mealworms were painted to resemble a velvet ant. Although "Bombus pensylvanicus" maintains aposematic coloration and defensive stinger, it faces many predators. Both involve aposematic coloration, or warning signals, to avoid being attacked by a predator. For example, the coral snake exhibits aposematic coloration that can be mimicked.