Irwin was born on his mother's birthday to Lyn and Bob Irwin in Essendon, a suburb of Melbourne, Victoria. He was of Irish descent on his father's side. He moved with his parents as a child to Queensland in 1970, where he attended Landsborough State School and Caloundra State High School. Irwin described his father as a wildlife expert interested in herpetology, while his mother Lyn was a wildlife rehabilitator.

A controversial incident occurred during a public show on 2 January 2004, when Irwin carried his one-month-old son, Bob, in his arm while hand-feeding a chicken carcass to Murray, a 3.8-metre (12 ft 6 in) saltwater crocodile. The infant was close to the crocodile, and comparisons were made in the press to Michael Jackson's dangling his son outside a German hotel window. In addition, some child welfare groups, animal rights groups, and some of Irwin's television viewers criticised his actions as irresponsible and tantamount to child abuse. Irwin apologised on the US NBC show Today. Both he and his wife publicly stated that Irwin was in complete control of the situation, as he had dealt with crocodiles since he was a small child, and based on his lifetime of experience neither he nor his son was in any danger. He also showed footage of the event shot from a different angle, demonstrating that they were much farther from the crocodile than they had appeared in the publicised clip. Terri Irwin said their child was in no more danger than one being taught to swim. No charges were filed; according to one journalist, Irwin told officials he would not repeat the action. The incident prompted the Queensland government to change its crocodile-handling laws, banning children and untrained adults from entering crocodile enclosures. In June 2004, allegations were made that he disturbed wildlife (namely whales, seals and penguins) while filming a documentary, Ice Breaker, in Antarctica. The matter was subsequently closed without charges being laid. After questions arose in 2003 about Irwin being paid $175,000 worth of taxpayers' money to appear in a television advertisement and his possible political ties, Irwin told the Australian Broadcasting Corporation (ABC) that he was a conservationist and did not choose sides in politics. His comments describing Australian Prime Minister John Howard as the "greatest leader in the world" earned him scorn in the media. Irwin was criticised for having an unsophisticated view of conservation in Australia that seemed more linked to tourism than to the problems Australia faces as a continent. In response to questions of Australia's problems with overgrazing, salinity, and erosion, Irwin responded, "Cows have been on our land for so long that Australia has evolved to handle those big animals." The Sydney Morning Herald concluded with the opinion that his message was confusing and amounted to "eating roos and crocs is bad for tourism, and therefore more cruel than eating other animals". CANNOTANSWERAnswer this question using a quote from the following article:

What kind of controversies was he involved with?

Irwin carried his one-month-old son, Bob, in his arm while hand-feeding a chicken carcass to Murray, a 3.8-metre (12 ft 6 in) saltwater crocodile.