Related by context. Frequent words. (Click for all words.) 58 wolf reintroduction 54 caribou herds 53 bison herds 53 feedgrounds 53 elk herd 53 elk herds 52 rangelands 52 overhunting 52 overgrazed 51 Yellowstone ecosystem 51 conservationists 51 wolves 50 lynx habitat 50 woodland caribou 49 Servheen 49 lynx 49 elk 49 greater sage grouse 49 wolf populations 49 wildlife 49 pronghorns 49 bighorns 49 elephant herds 48 wilderness designation 48 warmer winters 48 overgrazing 48 spotted owls 48 caribou herd 48 Sage grouse 48 herds 48 bison herd 48 bioprospecting 48 mountain caribou 48 black footed ferrets 47 forests 47 livestock grazing 47 deer herds 47 wildlands 47 endangered species protections 47 Yellowstone grizzlies 47 bison 47 Mexican gray wolves 47 Bighorn sheep 47 Tsavo East 47 spotted owl habitat 46 bighorn 46 wolf 46 grassland birds 46 gray wolf 46 disease brucellosis 46 wildlife biologists 46 grasslands 46 cougars 46 megafauna 46 Grizzly bears 46 mountain lions 46 trumpeter swans 45 ecologists 45 depopulating 45 uplands 45 marbled murrelet 45 pristine wilderness 45 rangeland 45 grizzly bears 45 bighorn sheep 45 forest ecosystems 45 Feral hogs 45 Invasive species 45 chytrid fungus 45 fragile ecology 45 habitat 45 Preble meadow jumping 45 oak woodlands 45 grizzlies 45 deer herd 45 National Elk Refuge 45 mountain pine beetles 45 pronghorn antelope 45 Yellowstone bison 45 aspen trees 45 subsistence hunting 44 clearcuts 44 Book Cliffs 44 wolf packs 44 Bitterroot Valley 44 ecology 44 interbreeding 44 sparsely inhabited 44 timber harvests 44 forested 44 ranchers 44 forest ecologist 44 Florida panthers 44 captive breeding 44 pastoralism 44 black tailed prairie 44 pine beetle infestation 44 environmentalists 44 ponderosa pines 44 wolverines 44 ecologically sensitive areas