It's partly a wildlife film, but unlike most it's largely about the unbridgeable gap between man and nature.
It's partly a biography and profile of its subject, amateur naturalist and self proclaimed activist Timothy Treadwell. But it is utterly unflinching in its portrayal of a loner who, while unquestiably committed, seems in many ways to be insane. In several extended takes, Herzog lets the camera roll past a conventional logical edit point, and in many of those moments we see how deeply disturbed Treadwell really was - cooing to foxes as though to babies, trying to spiritually "bond" with bears, and raging out of control, on camera, at his imagined "enemies" in the US Parks Service.
One is left with the impression of a man who couldn't establish an emotional connection with other humans, and deluded himself into believing he was finding it in his relationship with the bears...until, of course, he was killed by them.
Like the best of Herzog's work, this film has a deceptively simple structure and surface. Watch it a few times and you'll discover just how rich and disturbing Grizzly Man is.
Don't miss the short mini-documentary on the making of the soundtrack; it provides a rare glimpse of two under-appreciated musical masters, Henry Kaiser and the great Richard Thompson, at work with Hertzog in the studio.