Or red. Or orange, black, and white. In the natural world, many different animal species use bright colors and patterns to advertise the fact that they would make a horrible snack.
Watch this video to learn more.
At the American Museum of Natural History's exhibition The Power of Poison, you'll learn how certain colors may signal that an animal is poisonous or venomous. These warning colors are good for both predators and prey and can be seen in a variety of species, ranging from moths to mammals, across the animal kingdom.