A common inhabitant of moist savannas and grasslands, often found in marshy areas, the Olive Grass Snake is distributed from Uganda and the Republic of Congo southwards to the northeastern provinces of South Africa (Limpopo, Mpumalanga and Kwazulu-Natal).
These snakes are diurnal, strongly built, very fast, and great climbers. They prey mainly on lizards, frogs, small mammals and birds and even other snakes, including venomous species, that is subdued by its own venom while being held in the mouth. Olive Grass Snakes will easily bite when handled and their venom has a mild effect on humans, leading mainly to nausea and localized pain and swelling.
During the summer months females lay clutches of 10-30 eggs. The eggs hatch about 2 months after laying. Adults may attain a length of 1.8m, with females being larger than males.
The IUCN lists the Olive Grass Snake as being of least concern.