31. In most instances, these vocalisations are provided by either Nancy Cartwright or Yeardley Smith. 32. Sperm whales can produce three specific vocalisations : creaks, codas, and slow clicks. 33. It feeds mainly on insects and nectar . The vocalisation patterns are distinct among the subspecies 34. Zebras produce numerous sounds and vocalisations , when alarmed, they produce deep hoarse grunts. 35. Advertisement vocalisations by males appear to serve as cues by which females recognise their kin. 36. With regards to vocalisations , the similarities between wedgebills and whipbirds reflects the ancestral link. 37. Halafoff studied the complex vocalisations of superb lyrebirds in Australia, especially in Sherbrooke Forest. 38. During this experience Bj�rk began to develop her vocalisation punctuated by howls and shrieks. 39. The birds often give it in response to loud noises and playbacks of its vocalisations . 40. Additional phonetic diphthongs arise after vocalisation of.