What Adaptations do animals have hunted by many predators?

Some animals, such as poison dart frogs or the cane toad, are protected against predators because they are deadly poisonous if eaten. Some animals prefer spines or shells, making them unattackable, such as porcupines and turtles. The majority of animals try to protect themselves from predators by simply outrunning their predators, or a few are big and formidable enough they can sometimes fight off predators. Examples of herbivores that would fight off a predator include Cape buffalo and hippopotamus.