Related by context. Frequent words. (Click for all words.) 72 vertebrate species 71 amphibian species 71 bird species 70 species 67 frog species 67 primate species 62 biodiversity hotspots 61 mammals 58 coral species 58 subspecies 58 amphibians 57 critically endangered 57 mammalian species 56 megafauna 56 IUCN Red 55 taxa 55 mammal 55 vertebrates 54 penguin species 53 critically endangered species 53 clouded leopard 53 extinctions 53 vertebrate 53 ant species 52 Komodo dragons 52 fossilized bones 52 Critically Endangered 52 Sumatran tigers 52 giant tortoises 51 waterbirds 51 tyrannosaur 51 fossils 51 marine turtles 51 biodiverse 51 birdlife 51 marsupials 51 biodiversity 51 arthropod 51 palaeontologists 51 tyrannosaurs 51 theropods 51 clades 50 genetically distinct 50 flowering plants 50 leatherback turtles 50 invertebrates 50 primates 50 biomes 50 mountain gorillas 50 tropical rainforests 50 sauropods 49 extinct species 49 herbivores 49 skinks 49 habitats 49 Threatened Species 49 breeding colony 49 IUCN 49 genetic diversity 49 extinct 49 fauna 49 Siberian tigers 49 scrub jays 49 lineages 49 sauropod 49 Mammals 49 arthropods 49 koalas 49 dugongs 49 okapi 49 rarest birds 48 migratory species 48 nesting pairs 48 tropical forests 48 tigers 48 marine biodiversity 48 thylacine 48 Amur tigers 48 biome 48 lemurs 48 dinosaur fossils 48 Amphibians 47 flora 47 landmass 47 genera 47 phylogeny 47 Burmese pythons 47 fossilized remains 47 ocelots 47 reptiles 47 burrowing owl 47 breeding pairs 47 Denisovans 47 tropical forest 47 Populations 47 chimpanzees 47 gibbons 47 tapir 47 pikas 47 dinosaur fossil 47 populations