Coevolution Extended
Yet other animals have different forms of defense. Take the skunk for example. The species has developed a blinding spray that contains a horrible smell. Even though it might not be a threat in several forms, this spray keeps them alive. It was a forced evolutionary trait.
However, this also occurs when it comes to things like pollination. Bees and Hummingbirds both go from plant to plant, taking needed resources to help plants pollinate. Even though the plants are not touching each other, they are essentially pollinating to create the next generation via their flying friends.