The fatal bear attack on Treadwell and Huguenard occurred near Upper Kaflia Lake in Alaska's Katmai National Park. Ironically, after Treadwell spent most of his adult life trying to protect bears that were already protected by Alaska wildlife policies, his death forced authorities to kill two suspect, dangerous bears very soon after, near the camp where Treadwell and Huguenard were killed.
During a BBC interview about the film, Werner Herzog was shot with an air rifle. The interview was resumed indoors and at the end Herzog was encouraged to check his wound. Though there was "a bruise the size of a snooker ball, with a hole in it." Herzog declared "It was not a significant bullet. I am not afraid."
In the DVD's extra-feature section about the documentary's music-recording sessions with Richard Thompson and fellow musicians, Werner Herzog explains his vision for the material he asked the musicians to improvise. For instance, underneath the slow fight of two bears, cello and the upright bass are heard menacing. Also when Treadwell swims near a bear, Herzog explains that this is not the kind of harmony it appears to be, but instead it's a situation of dangerous foreshadowing.
Werner Herzog listened to the audio tape that records the last moments of Timothy Treadwell and Amie Huguenard as they're killed by grizzly bears. Contrary to some beliefs, he never owned the tape. It is owned by one of Timothy's friends who has never listened to it. However, out of respect for the late couple, Herzog declined to feature it in the film although there is a scene with Herzog listening to the footage.