Related by context. Frequent words. (Click for all words.) 70 amphibian populations 68 bee populations 63 honeybee population 62 grassland birds 62 honey bee colonies 61 species 60 honeybee colonies 59 amphibian species 58 freshwater ecosystems 58 pollinators 58 honeybee 58 Honey bees 57 pollinating insects 56 insect populations 56 avian species 56 bee colonies 56 honey bees 56 amphibians 56 terrestrial ecosystems 55 habitats 55 caribou herds 55 grassland habitat 55 pollinator 55 aquatic habitats 54 habitat fragmentation 54 honeybees 54 biodiversity 54 bird species 54 habitat 54 bee colony 54 forest ecosystems 54 ecosystems 54 wood stork 54 vertebrate species 54 aquatic ecosystems 53 overhunting 53 frogs toads 53 waterbirds 53 chytrid fungus 53 red legged frogs 53 sagebrush habitat 52 Colony Collapse Disorder 52 temperate forests 52 species extinctions 52 breeding colonies 51 mammals 51 adelgids 51 honey bee 51 ant species 51 bumblebees 51 seagrasses 51 White Nose Syndrome 51 soybean aphid 51 coral reef ecosystems 51 wintering grounds 51 black footed ferret 51 kelp forests 51 varroa mite 50 boreal forests 50 lowland forests 50 temperate regions 50 mountain caribou 50 Gypsy moths 50 wetland habitat 50 migrating waterfowl 50 coastal ecosystems 50 whitefly 50 burrowing owl 50 corn borer 50 hemlock woolly adelgid 50 harmful algal blooms 50 Butterfly Conservation 50 whitebark pine 50 ecology 50 extinctions 50 Yellowstone ecosystem 49 invasive species 49 Invasive species 49 Steller sea lion 49 mammalian species 49 freshwater mussels 49 insect pest 49 genetic diversity 49 keystone species 49 marine ecosystems 49 insects 49 aquatic species 49 insect 49 caribou herd 49 biologists 49 spoonbills 49 Emerald ash borer 49 aquatic ecosystem 49 marbled murrelet 49 temperate zones 49 adelgid 48 bobwhite quail 48 milder winters 48 arthropod 48 pollinate crops 48 nesting habitat