Timothy Treawell (April 29, 1957 – October 5, 2003) was an American bear enthusiast, environmentalist, amateur naturalist, and documentary film maker, whose birthname was Timothy Dexter. He lived among the coastal grizzly bears of Katmai National Park in Alaska, USA for approximately 13 seasons. At the end of his thirteenth season in the park in 2003, he and his girlfriend Amie Huguenard were killed and devoured by one or possibly two grizzly bears. An audio recording of the attack survived. Treadwell's life, work, and death were the subject of the 2005 documentary film by Werner Herzog titled Grizzly Man.