Related by context. Frequent words. (Click for all words.) 76 vocalizations 70 vocalization 59 scats 55 auditory cortex 54 mating 54 echolocation 53 olfaction 53 auditory 53 mating rituals 53 neuronal activity 53 hornbills 52 avian species 52 neural circuitry 51 habituation 51 reproductive hormones 51 birdsong 51 mammalian species 51 FOXP2 51 facial expressions 51 vocalizing 50 mammals 50 rhesus monkey 50 phonemes 50 macaque monkeys 50 mammal 50 mating habits 50 rhythmic patterns 50 narwhals 50 gesticulations 49 vowel sounds 49 behavioral traits 49 rhesus macaques 49 mockingbirds 49 bonobos 49 vertebrates 49 gibbon 49 cuckoos 49 theropod 49 forelimbs 49 synchrony 49 nonhuman primates 49 yelps 49 pheromones 48 electrophysiological 48 cawing 48 mewing 48 morphological 48 mirror neurons 48 squawks 48 mimicry 48 locomotor 48 neurones 48 whinny 48 mammalian 48 rhesus monkeys 48 birdlike 48 olfactory bulb 47 physiological responses 47 brain circuitry 47 gibbons 47 flycatchers 47 timbres 47 fruit fly Drosophila 47 mockingbird 47 locomotion 47 nuthatches 47 visual stimuli 47 primates 47 thrushes 47 chirps 47 mating ritual 47 noises 47 sensory input 47 neurochemistry 46 curlew 46 cichlids 46 auditory nerve 46 sensory neurons 46 estrus 46 flycatcher 46 excitability 46 scat singing 46 zoologists 46 howler monkeys 46 copulation 46 mooing 46 excitatory 46 capuchins 46 neural 46 songbirds 46 chimpanzees 46 auditory processing 46 anteaters 46 external stimuli 46 taxa 46 corticosterone 46 neural pathways 46 evolutionary adaptation 46 colorations 46 species 45 translocations