Cobras are a group of venomous snakes known for their distinctive hood, which they can expand when threatened. They belong to the family Elapidae and are found primarily in Africa and Asia. Cobras are known for their potent venom, which they use to immobilize prey, primarily small mammals and birds. There are several species of cobras, including the Indian cobra, Egyptian cobra, and King cobra. The King cobra is the longest venomous snake in the world, reaching lengths of up to 18 feet. Cobras are also famous for their role in various cultures, often symbolizing power and danger.