vocalization, glottal, prosody, diminuendo, motherese, zebra finch, unintelligibility, formant, syrinx, hindbrain, lyrebird, vocalise, diphthong, gesticulations, dimorphism, birdsongs, mimicry, osculation, scansion, yelps, chitter, trill, mudras, phoneme, assonance, spatiality, copulation, tumescence, grunting, cacophonic, estrous, auditory, chirruping, euphony, guttural, percussive instrument, scats, mating, whinny, sibilant, excretory, skylark, intonation, glissandos, echolocation, hyrax, fortissimo, melisma, attunement, ribbit, verbalization, birdcall, crotchets, phonology, plaintiveness, inaudibility, pentameter, mastication, caws, indri, glottal stop, oestrus, warbling, gigue, homophones, hornlike, winter wren, toadfish, past participle, loudness, somatosensory, nasal twang, fricative, sensate, vowel sound, tintinnabulation, rhythmicity, sensorimotor, nightingales, semitones, rustlings, embouchure, chromatic scale, pelage, auxiliary verb, perseveration, staccatos, amplification, noddy, portamento, hornbills, cor anglais, psychoacoustics, tremolos, panpipes, stereotypy, altissimo, arioso, mandibles, sibilance, morepork, fru, form, octave, rendition, autism, expression, \u00bb, chronology, clone, comprehension, description, explication, fruition, habituation, horoscope, i.e., imitation, multiple, nutrition