Common night adder
The common night adder can grow up to around 60 centimeters (24 in) long, making it the longest species of the genus Causus. The longest ever recorded was a male found in eastern Zimbabwe which was 93 centimeters (around 37 in) long. They are usually olive green, brown, or grayish-brown in color with black rhombic-shaped blotches, but not all have blotches on them.