Related by context. Frequent words. (Click for all words.) 70 vocalisations 68 zebra finches 59 melanogaster 58 fruit fly Drosophila 56 vocalizations 56 vocalization 55 placental mammals 54 nematode worms 54 mammalian species 54 katydids 53 Drosophila 53 morphologically 53 Wolbachia 52 neuronal activity 51 cowbird 51 phonemes 51 FOXP2 51 mitochondrial genome 51 macaque monkeys 51 toothed whales 51 mockingbird 51 C. elegans 50 frog species 50 gene expression patterns 50 prokaryotes 50 Caenorhabditis elegans 50 rhesus monkeys 50 gut microbes 50 songbirds 50 amino acid sequences 50 rhesus macaque 49 Drosophila melanogaster 49 neurones 49 species 49 T. gondii 49 RNA molecule 49 asexual reproduction 49 avian species 49 gene sequences 49 mating 49 nightingale 49 platypuses 49 Songbirds 49 mammalian 48 rhesus macaques 48 herpes viruses 48 transcriptome 48 finch 48 songbird 48 genome sequences 48 germline 48 vocal folds 48 neurons 48 ribozyme 48 otoliths 48 neural circuits 48 birdsong 48 motile 48 brain circuitry 48 female reproductive tract 48 neural circuitry 48 organism 48 Mockingbirds 47 skylarks 47 circadian clocks 47 meadowlarks 47 courtship rituals 47 mirror neurons 47 mouse embryos 47 multicellular organisms 47 courtship ritual 47 roundworms 47 eukaryotic cells 47 mockingbirds 47 simian immunodeficiency virus 47 receptor gene 47 lineages 47 mammal 47 nightingales 47 theropod 47 genetically identical 47 thrushes 47 genetically distinct 47 mammalian brain 47 mammals 47 mating rituals 47 vertebrate species 47 prosody 47 phyla 47 phylogeny 47 olfaction 47 evolutionarily 46 odorants 46 nonhuman primates 46 comparative genomics 46 vertebrates 46 bonobos 46 Mammalian 46 roundworm 46 protozoan 46 chimpanzees