[birds chirping] fortunately, mother nature has her own way of balancing the ecosystem, and while the bison here are formidable, in hayden valley, the wapiti lake wolf pack runs the show. [tense music] [wolves howling] and bison steak is on their menu. [tense music] [wolves barking] at 19 wolves strong, the pack is, of course, to be reckoned with. [tense music] [wolves howling] and they have fought off numerous attempts from other packs to steal their territory. [tense music] [wolves bark]