Related by context. Frequent words. (Click for all words.) 67 amphibian populations 65 grassland birds 62 bee populations 62 honeybee population 62 overhunting 62 sagebrush habitat 60 migratory songbirds 60 habitat 60 snowshoe hares 59 insect populations 59 habitat fragmentation 59 Gypsy moths 59 Sandhill cranes 59 caribou herds 58 Mule deer 58 grassland habitat 57 habitats 57 bobwhite quail 57 rampant poaching 57 deer herds 57 native pollinators 57 Sage grouse 57 species 57 bobwhite 56 nesting habitat 56 breeding colonies 56 frogs toads 56 habitat degradation 56 avian species 56 populations 56 bird species 55 Bighorn sheep 55 lapwing 55 waterbirds 55 Peregrine falcons 55 skylarks 55 lapwings 55 elk herds 55 White Nose Syndrome 55 grackle 55 Invasive plants 55 predation 54 barred owls 54 red legged frogs 54 rookeries 54 wintering birds 54 desert bighorn sheep 54 prairie chicken 54 Migrating birds 54 tree swallows 54 adelgids 54 petrels 54 Bald eagle 53 bitterns 53 wading birds 53 amphibian species 53 invasive insect 53 migrating waterfowl 53 pronghorns 53 black footed ferret 53 Infestations 53 amphibians 53 black capped chickadees 53 peregrines 53 pine marten 53 otters 53 hemlock woolly adelgid 53 temperate forests 52 mountain pine beetles 52 honeybee colonies 52 Soil erosion 52 cormorants 52 kangaroo rats 52 overfishing pollution 52 Populations 52 wood storks 52 pileated woodpeckers 52 ptarmigan 52 caribou herd 52 wild turkeys 52 overharvesting 52 guillemots 52 aquatic habitats 52 chytrid fungus 52 hornbills 52 birds 52 wetland ecosystems 52 black footed ferrets 52 bird migrations 52 nesting pairs 52 spoonbills 52 double crested cormorants 52 wetland habitat 52 migratory patterns 52 wood stork 51 snowy owls 51 greater sage grouse 51 sharp tailed grouse 51 nesting grounds 51 Yellowstone ecosystem 51 freshwater mussels