Related by context. Frequent words. (Click for all words.) 60 extinct 49 endangered mammal 48 functionally extinct 48 endangered 48 Extinct 48 extinction 47 Sea otters 47 Tibetan antelopes 46 critically endangered 46 extirpated 46 overharvested 46 yellow legged frogs 45 disappearing 45 imperiled 44 tigers leopards 44 vanishing 44 overhunting 44 voracious predators 44 endangered species 43 yellow legged frog 43 chiru 43 bears mountain lions 43 red legged frogs 43 Barn owls 43 elk bison 42 goshawks 42 keystone species 42 saber toothed tigers 42 lowland gorillas 42 species 42 Endangered 42 domesticated 41 Yellowstone cutthroat trout 41 freshwater turtles 41 federally endangered 41 subspecies 41 dodo 41 critically endangered species 41 apex predator 40 Hawaiian monk seals 40 jaguarundi 40 prehistoric 40 eiders 40 Sage grouse 40 montane 40 murrelet 40 apex predators 40 elephants tigers 40 dodos 40 vaquita 40 Inbreeding 39 Olive Ridley turtles 39 leopard frogs 39 rampant poaching 39 habitat degradation 39 woodland caribou 39 fossilize 39 Endangered species 39 lizards snakes 39 Arctic foxes 39 wolves roam 39 Fossilized 39 mountain caribou 39 Mammoths 39 biodiversity hotspot 39 Indohyus 39 avocets 39 Asiatic lion 38 dying breed 38 Whooping cranes 38 Sumatran rhinos 38 horned rhinos 38 dodo bird 38 Hector dolphins 38 elk moose 38 snowy plovers 38 overexploitation 38 Giant pandas 38 elephants rhinos 38 chupacabras 38 foxes coyotes 38 Tibetan antelope 38 saiga 38 freshwater habitats 38 platypuses 38 homo sapiens 38 overpopulating 38 Sumatran orangutans 38 canaries 38 preserved 38 wooly mammoths 38 endangered tigers 38 genetically distinct 38 Sumatran Tiger 38 overfishing pollution 38 exterminated 38 avian species 38 overharvesting 38 golden plover 38 Imperiled 38 endangered primates