Related by context. Frequent words. (Click for all words.) 75 bark beetles 74 mountain pine beetle 71 pine beetle 64 aspen 61 beetle 60 beetles 59 grizzly bears 58 gypsy moths 58 gypsy moth 57 ash trees 56 hemlocks 56 emerald ash borer 56 elk herd 56 ash borer 56 invasive weeds 54 aspens 54 spruce trees 54 Emerald Ash Borer 54 elk 54 invasives 53 junipers 53 fungal disease 53 mosquito populations 53 conifers 52 fungus 52 caterpillars 52 bighorns 52 grizzlies 52 noxious weeds 52 boreal forest 51 Dutch elm disease 51 mule deer 51 prairie dog 51 lynx 51 nose syndrome 51 elm trees 51 lichen 50 noxious weed 50 bull trout 50 grasshoppers 50 aphid 50 nematodes 50 deer herd 50 sage grouse 50 invasive species 50 conifer 50 aphids 50 insect 50 infestation 50 insect pests 49 woody plants 49 cougars 49 insects 49 pronghorn 49 prairie dogs 48 gray squirrels 48 birch trees 48 bighorn sheep 48 defoliation 48 beavers 48 rangeland 48 ponderosa pine 48 caribou 48 cottonwoods 48 moose 48 deer ticks 48 Forest Service 48 grizzly bear 48 infestations 47 nematode 47 elms 47 forest fires 47 bee colonies 47 fungi 47 vegetation 47 spotted owls 47 wolverines 47 wolf populations 47 feral hogs 47 pests 47 wildlife biologists 47 pine trees 47 cane toads 47 hantavirus 46 wolves 46 wildland fires 46 Douglas fir 46 pine forests 46 cutthroat trout 46 maples 46 larvae 46 cormorants 46 root rot 46 Canada geese 46 zebra mussels 46 lichens 46 mountain lions 46 pathogen 46 bison 46 white tailed deer 46 mosquito borne virus