Related by context. Frequent words. (Click for all words.) 59 vocalizations 55 vocalization 52 auditory cortex 52 macaque monkeys 52 songbirds 51 rhesus monkeys 51 mating 51 tamarins 50 echolocation 50 nestlings 50 rhesus macaques 49 fruit fly Drosophila 49 nonhuman primates 49 Songbirds 48 mockingbirds 48 gibbons 48 mouse embryos 48 wrens 48 crickets 47 gibbon 47 littermates 47 finches 47 thrushes 47 egg laying 47 offspring 47 macaques 47 bonobos 46 tadpoles 46 cichlids 46 capuchins 46 hornbills 46 Mammals 46 great horned owls 46 finch 46 wren 46 marmosets 46 chickadee 46 neural circuitry 46 sparrows 46 reproductive hormones 45 marmoset 45 synchrony 45 cygnets 45 gene expression patterns 45 birdsong 45 neuronal activity 45 frogs 45 mice 45 damselflies 45 matings 45 barn owls 45 cuckoos 45 tui 45 killdeer 45 auditory 44 mammalian species 44 heterozygous 44 electrophysiological 44 reproductive biology 44 owls 44 birds 44 fledge 44 tapirs 44 mutant mice 44 females 44 mating rituals 44 songbird 44 nuthatches 44 flycatchers 44 chicks 44 zoologists 43 visual stimuli 43 chromosomal abnormality 43 barn swallows 43 estrus 43 asexual reproduction 43 transgenic mice 43 Wolbachia 43 nightingale 43 cowbirds 43 mammals 43 piglets 43 hatchling 43 neural circuits 43 genetically identical 43 bird species 43 chimpanzees 43 monkeys 43 starling 43 mating habits 43 bonobo 43 mockingbird 42 poults 42 chimps 42 barn owl 42 macaque 42 auditory processing 42 fledglings 42 mirror neurons 42 lemurs 42 nesting