All of these animals from the mostly innocent black widow spider to the deadly taipan snake have one thing in common: they use venom, or poison, for defense. Read about how these poisonous animals survive in their natural habitats and what part they play in the food chains and ecosystems in which they live. The question and answer feature throughout the book promotes reader inquiry, while the list of resources encourages further research and learning. This photo-illustrated book for elementary readers describes the venomous poison dart frog. Readers learn how these rainforest frogs use venom to as a protection against predators. Also explains how people have used the poison for hunting and medicines.