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Venomous snakes are a subgroup of reptiles belonging to the order Squamata, characterized by their ability to inject venom into prey or predators through specialized fangs. They are found worldwide and vary greatly in size, coloration, and behavior. Venom is produced by specialized glands located in the head and delivered through a hollow or grooved fang. The venom can have various effects such as hemorrhage, necrosis, paralysis, or even death to the victim. These snakes are highly diverse, with over 3,000 species described, many of which are endemic to specific regions. They play an important role in controlling rodent populations and maintaining the balance of ecosystems. Some examples of venomous snakes include rattlesnakes, cobras, vipers, and taipans.