Related by context. Frequent words. (Click for all words.) 61 duck billed platypus 60 Darwin finches 60 Indohyus 59 peccary 58 marine iguanas 58 aurochs 58 Diplodocus 57 crocodilian 57 echidnas 57 kipunji 57 theropod dinosaurs 57 frogs turtles 57 monotremes 56 saddleback 56 sexual dimorphism 56 sapiens 56 placental mammals 56 theropod 56 flatworm 56 brachiosaurus 55 echinoderms 55 insectivores 55 H. floresiensis 55 amphibians reptiles 55 baleen whale 55 microcephalic 55 mammalian species 55 skink 55 frogs salamanders 54 bears mountain lions 54 Olduvai Gorge 54 horned dinosaurs 54 Apatosaurus 54 aardvarks 54 opposable thumb 54 featherless 54 ichthyosaur 54 H. sapiens 54 wormlike 54 mosasaurs 54 Barn owls 54 systematics 54 Raptorex 54 Torosaurus 54 trilobite 54 tigers leopards 54 convergent evolution 54 montane 54 arthropod 54 feathered dinosaurs 54 morphologically 54 taxidermied 54 chimpanzees gorillas 54 Microraptor 54 Chlamydomonas 54 insects spiders 54 fossilized skull 53 allosaurus 53 carnivorous dinosaurs 53 ground sloths 53 apelike 53 damselfish 53 auklets 53 Smilodon 53 Ventastega 53 vocalisations 53 subfamily 53 braincase 53 daddy longlegs 53 pipefish 53 americanus 53 saber tooth tigers 53 canadensis 53 eyespots 53 hermaphroditic 53 pigmy 53 canids 53 lemur 53 turtles frogs 53 toothed whales 53 subsp 53 phylogeny 53 springtails 52 hissing cockroaches 52 ring tailed lemur 52 Paranthropus 52 snakes lizards 52 taxa 52 homo erectus 52 quadrupeds 52 eukaryote 52 theropods 52 tetrapod 52 bryozoans 52 reproductive biology 52 giant tortoise 52 Grevy zebra 52 Lemurs 52 pterosaur 52 invertebrate animals 52 australopithecines