Crocodile Takes A Hippo Ride, Luwego River Near Lukula, Tanzania

- H. a. kiboko – in the Horn of Africa, in Kenya and Somalia. Kiboko is the Swahili word for hippo. Broader nasals and more hollowed interorbital region.
- H. a. capensis – from Zambia to South Africa. Most flattened skull of the subspecies.
- H. a. tschadensis – throughout Western Africa to, as the name suggests, Chad. Slightly shorter and wider face, with prominent orbits.
- H. a. constrictus – in Angola, the southern Democratic Republic of Congo and Namibia. Named for its deeper preorbital constriction.