Venomous African snakes are a group of snakes that are native to the continent of Africa and are known for their highly toxic venom. The most well-known of these snakes is the mamba, which is a genus of large, fast-moving, highly venomous snakes found in various parts of Africa. Mambas are typically green or black in color and can grow up to 4.3 meters in length. They are considered to be one of the most dangerous snakes in the world due to their aggressive behavior and potent venom.