Related by context. Frequent words. (Click for all words.) 74 frog species 73 amphibians 71 mammal species 71 species 70 bird species 65 coral species 63 critically endangered 62 biodiversity hotspots 61 Critically Endangered 58 primate species 56 critically endangered species 56 mountain gorillas 55 marine turtles 55 coral reefs 55 bee populations 55 extinctions 55 mammals 54 aquatic species 54 Amphibians 54 habitats 54 biodiversity 54 leatherback turtles 54 amphibian 54 Sumatran tigers 53 salamanders 53 megafauna 53 mammalian species 53 ant species 53 mass extinctions 52 subspecies 52 biodiverse 52 taxa 52 IUCN Red 52 ocelots 52 tropical forests 52 frogs 52 waterbirds 52 ecosystems 52 IUCN 52 habitat 51 leatherback 51 monk seal 51 pikas 51 nesting pairs 51 mammal 51 tropical rainforests 51 vertebrates 51 mountain glaciers 51 Nature IUCN 51 endangered species 50 Important Bird 50 marine biodiversity 50 leatherbacks 50 drylands 50 biologically diverse 50 Threatened Species 50 Coral reefs 49 mangrove forests 49 black footed ferret 49 migratory species 49 Komodo dragons 49 tropical forest 49 otters 49 otter 49 extinct 49 black footed ferrets 49 biomes 49 breeding pairs 49 Colony Collapse Disorder 49 fauna 49 Amur tigers 49 California condors 49 P. falciparum 48 marine ecosystems 48 extinct species 48 salamander 48 invertebrates 48 corals 48 mass extinction 48 woodland caribou 48 sea otters 48 biota 48 forest ecosystems 48 sea turtles 48 extinction 47 flowering plants 47 jaguars 47 birdlife 47 basking sharks 47 mountain pine beetles 47 wetland habitats 47 rainforests 47 breeding colony 47 baiji 47 freshwater lakes 47 Species 47 dieback 47 insect populations 47 coastal ecosystems 47 glaciers 47 manatee deaths