Theresa Penelope "Terri" Irwin, AM (born July 20, 1964) is an Australian-based, American-born naturalist, author, the widow of Australian naturalist Steve Irwin, and owner of Australia Zoo at Beerwah, Queensland, Australia. She co-starred with her husband on The Crocodile Hunter, their unconventional television nature documentary series, as well as their spin-off series, The Crocodile Hunter Diaries and the Croc Files. She has lived in Australia since 1992, when she married Steve Irwin.
The youngest of three daughters, she was born Theresa Penelope Raines in Eugene, Oregon. Her family was in the trucking business. As a girl, her father constantly brought home injured animals from the highways on which his trucks travelled; this eventually instilled in her an ongoing commitment to saving and rehabilitating wild animals. While working in the family business in 1986, she started a rehabilitation facility called "Cougar Country" to re-educate and release predatory mammals such as foxes, possums, raccoons, bears, bobcats, and cougars back into the wild. Soon she was handling 300 animals each year.
She joined an emergency veterinary hospital in 1989 as a veterinary technician to gain