Related by context. Frequent words. (Click for all words.) 68 megafauna 62 mammals 61 saber toothed tigers 60 species 60 marsupials 60 platypuses 59 marine reptiles 59 Indohyus 58 flightless birds 58 cassowary 58 mammal 57 carnivores 57 avian species 57 thylacine 56 giant tortoises 56 petrels 56 toothed whales 55 amphibian populations 55 clouded leopards 55 skink 55 Adelie penguins 55 marine invertebrates 55 frog species 55 Tasmanian tiger 55 quolls 55 placental mammals 54 vertebrate species 54 herbivores 54 Sea otters 54 carnivorous dinosaurs 54 convergent evolution 54 woolly mammoths 53 Leatherbacks 53 overhunting 53 elephant seals 53 cetaceans 53 tyrannosaur 53 herbivore 53 feathered dinosaurs 53 herbivorous 53 marine iguanas 53 creatures 53 Argentine ants 53 fur seals 53 breeding colony 53 crocodilians 53 Cane toads 53 biodiversity hotspot 53 apex predators 53 theropod 52 bustard 52 Extinct 52 Humpback whales 52 Cambrian explosion 52 lorikeets 52 taxonomists 52 ungulates 52 amphibian species 52 mammal species 52 vertebrate animals 52 pine marten 52 cetacean 52 chytrid fungus 52 basking sharks 52 mammalian species 52 keystone species 51 marine reptile 51 Migaloo 51 Galapagos islands 51 guillemots 51 palaeontology 51 mammoths 51 Komodo dragons 51 amphibians 51 terrestrial ecosystems 51 temperate forests 51 Lemurs 51 trilobites 51 prehistoric creatures 51 Bornean 51 Whale sharks 51 Homo sapiens 51 stoat 51 humans 51 leatherback turtles 51 ungulate 51 dugongs 51 Killer whales 51 pumas 51 genetically distinct 50 Sperm whales 50 fauna 50 rhinoceroses 50 tyrannosaurs 50 carnivore 50 biodiversity hotspots 50 ammonites 50 harbor porpoises 50 frogs toads 50 toads 50 leatherback turtle