Related by context. Frequent words. (Click for all words.) 64 Critically Endangered 63 species 61 amphibian species 59 critically endangered 59 IUCN Red 59 vertebrate species 58 federally endangered species 58 biodiversity hotspots 57 penguin species 57 Cook Inlet belugas 57 mammal species 57 coral species 56 endangered 56 Threatened Species 55 marbled murrelet 54 lowland forests 54 critically endangered species 54 primate species 54 Nature IUCN 54 biodiversity hotspot 54 Pacific walrus 53 habitats 53 amphibian populations 53 Mexican spotted owl 53 marbled murrelets 53 endangered species 53 Sea otters 53 pygmy owl 52 wood stork 52 ribbon seals 52 greater sage grouse 52 bird species 52 Sage grouse 52 avian species 52 amphibians 52 habitat fragmentation 51 temperate forests 51 Kemp ridley 51 northern spotted owls 51 subpopulations 51 mating pairs 50 mussel species 50 aquatic species 50 horned rhinoceros 50 endangered primates 50 frogs toads 50 mammals 50 phyla 50 Steller sea lions 50 longfin smelt 50 Olive Ridley turtles 50 seagrasses 50 wetland ecosystems 50 overexploited 50 Endangered 49 ringed seals 49 marine turtles 49 Florida panthers 49 federally endangered 49 Invasive plants 49 habitat 49 migratory species 49 IUCN 49 ecosystems 49 black footed ferret 49 frog species 49 snowy plover 49 pikas 49 petrels 49 leatherback turtles 49 reproductive toxicity 49 vertebrate animals 49 aquatic invertebrates 49 taxa 49 white tailed prairie 48 tiger salamander 48 marine invertebrates 48 overfishing pollution 48 populations 48 grassland birds 48 fauna 48 loggerhead sea turtles 48 mammalian species 48 Endangered species 48 tiger habitats 48 coral reef ecosystems 48 species extinctions 48 Polar bears 48 porbeagle 48 terrestrial ecosystems 48 horned rhinos 48 yellow legged frog 48 extinction 48 coastal ecosystems 48 endocrine disruption 48 molluscs 48 red legged frogs 48 freshwater turtles 48 false killer whales 47 Endangered Wildlife 47 aquatic habitats