Related by context. Frequent words. (Click for all words.) 67 mammal species 65 species 61 primates 61 chimpanzees 60 taxa 60 mammals 59 vertebrates 58 amphibian species 57 frog species 57 vertebrate 57 lineages 55 bird species 55 subspecies 54 Homo sapiens 54 theropods 54 hominid 54 coral species 53 mammal 53 chimps 53 P. falciparum 53 nonhuman primates 53 arthropods 53 primate 53 Neandertals 52 Australopithecus 52 bonobos 52 clade 52 sauropod 52 mammalian 51 sauropods 51 fossils 51 tyrannosaurs 51 apes 50 Sumatran tigers 50 T. rex 50 extinct species 50 subpopulations 50 avian influenza viruses 50 megafauna 50 gibbons 49 Plasmodium 49 hominids 49 taxonomic 49 genetic diversity 49 critically endangered 49 genome sequences 49 rhesus monkeys 49 Plasmodium falciparum 49 Archaeopteryx 49 Chimpanzees 48 amphibians 48 fossilized remains 48 tigers 48 genetically distinct 48 specimens 48 phylogenetic 48 gene sequences 48 T rex 48 herbivores 48 lemurs 48 orangutans 48 baleen whales 48 miRNAs 48 tetrapods 48 genetic markers 48 genetic variation 48 triceratops 48 critically endangered species 48 Siberian tigers 47 fossil 47 macaques 47 Komodo dragons 47 gibbon 47 pterosaur 47 haplotypes 47 Homo floresiensis 47 antelopes 47 genera 47 sloths 47 humans 47 giant tortoises 47 pterosaurs 47 macaque 47 subtypes 47 palaeontologists 47 genomes 47 lemur 47 gorillas 47 herbivore 46 IUCN Red 46 monkeys 46 homo sapiens 46 fossilized bones 46 lizards 46 Homo erectus 46 genes 46 carnivores 46 loci 46 rhinoceroses 46 molluscs 46 flightless birds