Related by context. Frequent words. (Click for all words.) 56 densities 55 populations 54 density 54 Infant mortality rates 51 huntable 49 prevalences 49 temperate forests 48 rapidly urbanizing 48 concentrations 48 Mule deer 48 population 48 sparse vegetation 47 semi arid regions 47 mortality 47 temperate zones 47 micropolitan areas 46 topographically 46 coniferous forests 46 overharvested 46 deciduous forests 46 densely populated 46 genetic variability 46 sparsely inhabited 46 walkable urban 46 Rapid urbanization 46 deer herds 46 Per capita income 45 arsenic concentrations 45 Soil erosion 45 Soil moisture 45 refugia 45 latitudes 45 overpopulated 45 montane 45 HIV prevalence 45 fertile soils 45 urban 44 conifer forests 44 bobwhites 44 Greater Yellowstone Ecosystem 44 urbanized 44 Sparsely populated 44 socioeconomic 44 subregions 44 riparian zones 44 prevalence 44 aquatic invertebrates 44 Outlying areas 44 Demographic trends 44 forage 44 voracious eaters 43 lakeshores 43 birthrates 43 habitat fragmentation 43 outmigration 43 Migrating birds 43 genetic diversity 43 micro climates 43 caribou herds 43 river deltas 43 streamflows 43 spatial scales 43 wintering birds 43 incidence 43 migratory bird species 43 intensively farmed 43 cottontail rabbits 43 severe droughts 43 areas 43 rookeries 43 prolonged droughts 43 bioenergy crops 42 agglomerations 42 Farmed salmon 42 overharvest 42 calcium intakes 42 colder winters 42 arid climates 42 acidic soils 42 Teenage pregnancy 42 red cockaded woodpeckers 42 spruce fir 42 historically 42 buffalo herds 42 antlerless harvest 42 sub Sahara 42 PBDE levels 42 Vacancy rates 42 irrigated crops 42 carbon dioxide concentrations 42 Sage grouse 42 Infestations 42 deer overpopulation 42 acorn crop 42 wetter winters 42 trophic 42 CBDs 42 overpopulating 42 Urban sprawl 42 census tracts 42 mammals reptiles