Snap, crackle, pop. The harmless log that just floated by you has turned into a jaw-snapping death machine. A crocodile may swim by unassumingly but make no mistake, they are on the hunt for their next prey. Crocodiles have heightened smell, sight and hearing, and can hold their breath for over an hour. Their ability to lurk underwater makes them the third most dangerous predator in all of Africa. The freshwater Nile crocodile is one of the deadliest animals on the Nile River, with a wildlife carcass count only behind that of lions and hippos. The good news is, only 7 of the 23 known croc species are considered dangerous to humans. The bad news is, the one in front of you is one of those seven, and it's very, very hungry.