Bathing hippos usually have a tolerant attitude towards their fellow creatures — until something snaps. And then, as this crocodile discovered the hard way, they are the most dangerous wild animals in Africa

Vaclav Silha, a Czech wildlife photographer, had set up his camera on the banks of the Grumeti in the Serengeti National Park, Tanzania, to take pictures of a group of 50 placid hippos when an explosive fight erupted — a thrashing scrum that ended seconds later in the crocodile's violent death.