Venomous animal injects venom into its prey or attacker using fangs, stingers, or other specialized appendages, whereas a poisonous animal or plant delivers poison by being touched, consumed, or inhaled. In other words, venomous organisms have a delivery system, while poisonous organisms do not necessarily have a means to deliver their toxic substances. For example, snakes are venomous because they utilize fangs for venom injection, while the poison dart frog is poisonous because its skin secretes poisonous toxins, which predators absorb through touch or ingestion.