Related by context. Frequent words. (Click for all words.) 74 lodgepole pines 70 mountain pine beetles 70 aspen trees 70 lodgepole pine 66 beetle infestation 65 aspen 64 ponderosa pines 64 pine beetles 63 aspens 63 bark beetles 63 bark beetle infestation 63 hemlock trees 62 mountain pine beetle 61 pine trees 60 bark beetle 59 hardwood trees 59 cottonwood trees 58 hemlocks 58 spruce trees 57 pine beetle 57 trees 56 juniper trees 56 conifers 56 beech trees 56 oak woodlands 56 hardwood forests 56 Douglas firs 56 beetle 55 pine forests 55 ash trees 55 junipers 55 cottonwoods 54 Douglas fir 54 cottonwood 54 ponderosa pine 54 birch trees 54 conifer 54 fir trees 53 beetles 53 woody plants 53 scrub oak 53 birches 52 oak trees 52 elm trees 52 evergreen trees 52 lichen 52 Scotch pine 52 pine plantations 52 sycamore trees 52 saguaros 52 manzanita 52 vegetation 51 maples 51 elk herds 51 poplar trees 51 tailed deer 51 borers 51 forests 51 walnut trees 51 hibernating bats 50 Douglas Fir 50 black footed ferrets 50 woody debris 50 cottonwood tree 50 understory 50 boreal forests 50 tamarisk 50 hardwood forest 50 pines 50 sugar maples 50 sagebrush 50 pine plantation 49 deciduous trees 49 longleaf pine 49 palmettos 49 blowdown 49 mesquite trees 49 balsam fir 49 Mogollon Rim 49 salt cedar 49 whitebark pine 49 forested 49 virgin forests 49 mountain laurel 49 leafless 49 foliage 49 bighorns 49 boreal forest 49 ridge tops 49 willows 49 juniper 49 defoliated 49 amphibian species 48 cedars 48 trumpeter swans 48 woodlands 48 pecan trees 48 elms 48 cheatgrass 48 steep rugged terrain 48 knapweed