CAIRNS, Australia (Sept. 5) -- Steve Irwin, the hugely popular Australian television personality and conservationist known as the "Crocodile Hunter," was killed Monday by a stingray while filming off the Great Barrier Reef. He was 44.Irwin was at Batt Reef, off the remote coast of northeastern Queensland state, shooting a segment for a series called "Ocean's Deadliest" when he swam too close to one of the animals, which have a poisonous barb on their tails, his friend and colleague John Stainton said.
"He came on top of the stingray and the stingray's barb went up and into his chest and put a hole into his heart," said Stainton, who was on board Irwin's boat at the time.
Crew members aboard the boat, Croc One, called emergency services in the nearest city, Cairns, and administered CPR as they rushed the boat to nearby Low Isle to meet a rescue helicopter. Medical staff pronounced Irwin dead when they arrived a short time later, Stainton said, adding that he probably died instantly
"It became clear fairly soon that he had non-survivable injuries," Dr. Ed O'Loughlin, who treated Irwin, told Australian television. "He had a penetrating injury to the left front of his chest. He had lost his pulse and wasn't breathing."
Irwin was famous for his enthusiasm for wildlife and his catchword "Crikey!" in his television program "Crocodile Hunter." First broadcast in Australia in 1992, the program was picked up by the Discovery network, catapulting Irwin to international celebrity.
He rode his image into a feature film, 2002's "The Crocodile Hunters: Collision Course" and developed the wildlife park that his parents opened, Australia Zoo, into a major tourist attraction.
"The world has lost a great wildlife icon, a passionate conservationist and one of the proudest dads on the planet," Stainton told reporters in Cairns. "He died doing what he loved best and left this world in a happy and peaceful state of mind. He would have said, 'Crocs Rule!'"
Prime Minister John Howard, who hand-picked Irwin to attend a gala barbecue to honor President Bush when he visited in 2003, said he was "shocked and distressed at Steve Irwin's sudden, untimely and freakish death."
"It's a huge loss to Australia," Howard told reporters. "He was a wonderful character. He was a passionate environmentalist. He brought joy and entertainment and excitement to millions of people."
Irwin, who made a trademark of hovering dangerously close to untethered crocodiles and leaping on their backs, spoke in rapid-fire bursts with a thick Australian accent and was almost never seen without his uniform of khaki shorts and shirt and heavy boots.
Wild animal expert Jack Hanna, who frequently appears on TV with his subjects, offered praise for Irwin.
"Steve was one of these guys, we thought of him as invincible," Hanna, director emeritus of the Columbus (Ohio) Zoo and Aquarium, told ABC's "Good Morning America" Monday.
"The guy was incredible. His knowledge was incredible," Hanna said. "Some people that are doing this stuff are actors and that type of thing, but Steve was truly a zoologist, so to speak, a person who knew what he was doing. Yes, he did things a lot of people wouldn't do. I think he knew what he was doing."
Irwin's ebullience was infectious and Australian officials sought him out for photo opportunities and to promote Australia internationally.