Things you should've known about Steve Irwin...
He single-handedly brought back the old-fashioned Australian term "Crikey!" from the brink of oblivion.
He has been the public face of many environmental projects such as the Steve Irwin Conservation Foundation.
He most recently has promoted Australia's quarantine laws to incoming tourists.
Irwin was also seen as a vocal critic of wildlife hunts in Australia. The federal government recently dropped plans to allow crocodile safaris for wealthy tourists in the Northern Territory following his vehement objections.
He is survived by his American wife Terri, from Oregon, and their daughter Bindi Sue, 8, and son Bob, who will turn 3 in December.