The North American, Nile, and estuarine are the largest crocodiles and therefore the most dangerous - especially saltwater crocs, which include humans on their list of prey - freshwater crocodiles stick to insects, fish, frogs, and other smaller creatures found near the water.

The Australian estuarine crocodiles are cantankerous and sometimes lunge at anything that moves. Direct descendants of dinosaurs, they lie still in the water waiting for their prey. They then overpower, drown and dismember their victim, before they devour their feast.