Related by context. Frequent words. (Click for all words.) 63 amphibian populations 58 overhunting 56 sagebrush habitat 56 bee populations 55 amphibian species 54 Populations 54 populations 54 species 54 temperate forests 54 lowland forests 54 caribou herds 54 grassland birds 54 bird species 54 honeybee population 53 avian species 53 waterbirds 52 vertebrate species 52 seagrasses 52 freshwater turtles 52 temperate regions 52 species extinctions 52 Cook Inlet belugas 52 Mule deer 52 temperate zones 52 Yellowstone ecosystem 51 habitats 51 HNWI population 51 overfishing pollution 51 Critically Endangered 51 terrestrial ecosystems 50 elephant poaching 50 habitat fragmentation 50 mammal species 50 caribou herd 50 beluga sturgeon 50 scaup 50 Sage grouse 50 honeybee colonies 50 rampant poaching 50 Steller sea lions 49 atmospheric methane 49 Overfishing 49 overharvesting 49 biodiversity hotspots 49 pikas 49 migratory species 49 nesting pairs 49 frogs toads 49 elephant herds 49 insect populations 49 mountain glaciers 48 habitat 48 polar bear populations 48 megafauna 48 mountain caribou 48 rookeries 48 habitat degradation 48 Infestations 48 Melting glaciers 48 milder winters 48 frog species 48 Soil erosion 48 mammals 48 overexploitation 48 wintering grounds 48 river deltas 48 Droughts 48 Florida panthers 47 semi arid regions 47 ocean acidity 47 apex predators 47 chytrid fungus 47 coastal ecosystems 47 drylands 47 woodland caribou 47 bobwhite 47 guillemots 47 longfin smelt 47 overgrazing 47 grassland habitat 47 boreal 47 Irrawaddy dolphins 47 marine biodiversity 47 deer herds 47 breeding pairs 47 petrels 47 glacial melt 47 coral species 47 IUCN Red 47 leatherbacks 47 extinctions 46 pelagic fish 46 musk oxen 46 wetland habitats 46 freshwater ecosystems 46 herds 46 invasive insect 46 glaciers 46 wolf populations 46 breeding colonies 46 marbled murrelet