Black mambas can grow to be 14 ft (4.2 m) long, making them the longest venomous snake in Africa and the second longest in the world.
Black mambas are not actually black, but are usually olive, brown, or gray with a lighter underside. The inside of their mouths is black, which is how they got their name.
Black mambas have a narrow, coffin-shaped head with a pronounced brow ridge and medium-sized eyes.
Black mambas have neurotoxic and cardiotoxic venom, and can strike repeatedly. 10–15 mg of their venom is fatal to humans.
Black mambas live in sub-Saharan Africa, in areas such as savannahs, rocky hillsides, termite mounds, and hollow tree trunks.
Black mambas eat small mammals, birds, and sometimes other snakes.