A classic gaping mouth shot of a hippopotamus (Hippopotamus amphibious) at the western end of Long Pool in Mana Pools National Park. This image shows another well known agnostic trait, that of water scooping which is often combined with yawning or gaping. Richard Estes, in his book ‘The Behaviour Guide to African Mammals’ states that the hippo jaws are wide enough to bite a three meter crocodile in two. He relates the story of a bull hippo dragging three lions into the water, when set upon by them. Lions often win, however, and feast on the carcass for days.