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1 December 2002 Geographic Variation in the Echolocation Calls of Vespadelus spp. (Vespertilionidae) from New South Wales and Queensland, Australia
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We investigated the extent of geographic variation in the echolocation calls of five species of microchiropteran Vespadelus in eastern Australia. Bat calls were recorded with Anabat II detectors and computers, and analysed using Analook software. A single call parameter, characteristic frequency (the frequency at the end of the flattest part of the call), was used to document changes in echolocation calls over geographic distance. For V. vulturnus and V. regulus, changes in call frequency were abrupt and sizeable (up to 14 kHz), with two or three frequency groups present within each species. In V. darlingtoni, the changes in frequency were gradual across their range, with an isolated island population resembling the closest region on the mainland. One species examined here, V. troughtoni, had calls that were consistent throughout its range. Calls of V. pumilus were also consistent across geographic regions except for at one site (Chichester State Forest). At this site calls occupied only the upper end of the species frequency range. Body size, measured as forearm length for each species, was significantly smaller at inland sites, but did not vary with latitude or consistently with intraspecific call variation. Broad patterns and possible causes of geographic variation in call frequency are discussed. We conclude that confident identifications of Vespadelus calls from the geographic regions outlined in this paper will only be made with reference calls collected from the relevant regions.


  1. R. M. R. Barclay 1999. Bats are not birds: a cautionary note on using echolocation calls to identify bats. Journal of Mammalogy, 80: 290–96. Google Scholar
  2. R. M. R. Barclay , J. H. Fullard , and D. S. Jacobs . 1999. Variation in the echolocation calls of the hoary bat (Lasiurus cinereus): influence of body size, habitat structure, and geographic location. Canadian Journal of Zoology, 77: 530–534. Google Scholar
  3. K. Barlow 1997. The diets of two phonic types of the bat Pipistrellus pipistrellus in Britain. Journal of Zoology (London), 243: 597–609. Google Scholar
  4. B. J. Betts 1998. Effects of interindividual variation in echolocation calls on identification of big brown and silver-haired bats. Journal of Wildlife Management, 62: 1003–1010. Google Scholar
  5. W. Bogdanowicz , M. B. Fenton , and K. Daleszczyk . 1999. The relationships between echolocation calls, morphology and diet in insectivorous bats. Journal of Zoology (London), 247: 381–393. Google Scholar
  6. R. M. J. Brigham , J. E. Cebek , and M. B. C. Hickey . 1989. Intraspecific variation in the echolocation calls of two species of insectivorous bats. Journal of Mammalogy, 70: 426–128. Google Scholar
  7. S. Churchill 1998. Australian bats. Reed New Holland, Sydney, 230 pp. Google Scholar
  8. L. E. Conole 2000. Acoustic differentiation of Australian populations of the large bentwing bat Miniopterus schreibersii (Kuhl, 1817). Australian Zoologist, 31: 443–146. Google Scholar
  9. C. Corben , and G. M. Fellers . 2001. Choosing the ‘correct’ bat detector — a reply. Acta Chiropterologica, 3: 253–256. Google Scholar
  10. A. M. Duffy , L. F. Lumsden , C. R. Caddle , R. R. Chick , and G. R. Newell . 2000. The efficacy of Anabat ultrasonic detectors and harp traps for surveying microchiropterans in southeastern Australia. Acta Chiropterologica, 2: 127–144. Google Scholar
  11. M. B. Fenton 2000. Choosing the ‘correct’ bat detector. Acta Chiropterologica, 2: 215–224. Google Scholar
  12. M. B. Fenton , S. Bouchard , M. J. Vonhoff , and J. Zigouris . 2001. Time-expansion and zero-crossing period meter systems present significantly different views of echolocating calls of bats. Journal of Mammalogy, 82: 721–727. Google Scholar
  13. A. Herr 1998. Aspects of the ecology of insectivorous forest-dwelling bats (Microchiroptera) in the western slopes of the Australian Alps. Ph.D. Thesis, Charles Sturt University, Albury, New South Wales, 273 pp. URL:  Google Scholar
  14. G. Jones 1997. Acoustic signals and speciation: the roles of natural and sexual selection in the evolution of cryptic species. Advances in the Study of Behaviour, 26: 317–354. Google Scholar
  15. G. Jones , and M. Van Parus S. . 1993. Bimodal echolocation in pipistrelle bats: are cryptic species present? Proceedings of the Royal Society of London B, 251: 119–125. Google Scholar
  16. E. K. V. Kalko , and H.-U. Schnitzler . 1993. Plasticity of echolocation signals of European pipistrelle bats in search flight: implications for habitat use and prey detection. Behavioral Ecology and Sociobiology, 33: 415–128. Google Scholar
  17. D. J. Kitchener , B. Jones , and N. Caputi . 1987. Revision of Australian Eptesicus. Records of the Western Australian Museum, 13: 427–500. Google Scholar
  18. B. S. Law , and J. Anderson . 1999. A survey for the Southern Myotis Myotis macropus (Vespertilionidae) and other bat species in River Red Gum Eucalyptus camaldulensis forests of the Murray River, New South Wales. Australian Zoologist, 31: 166–174. Google Scholar
  19. B. S. Law , and M. Chidel . 2001. Bat activity 22 years after first-round intensive logging of alternate coupes near Eden, New South Wales. Australian Forestry, 64: 242–247. Google Scholar
  20. L. F. Lumsden , and A. F. Bennett . 1995. Bats of a semi-arid environment in south-eastern Australia: biogeography, ecology and conservation. Wildlife Research, 22: 217–240. Google Scholar
  21. M. Maher , and S. M. Carpenter . 1984. Benthic studies of waterfowl breeding habitat in southwestern New South Wales. II. Chironomid populations. Australian Journal of Freshwater Research, 35: 97–110. Google Scholar
  22. J. L. Mckean 1975. The bats of Lord Howe Island with the description of a new Nyctophiline bat. Australian Mammalogy, 1: 329–332. Google Scholar
  23. D. J. Mills , T. W. Norton , H. E. Parnaby , R. B. Cunningham , and H. A. Nix . 1996. Designing surveys for microchiropteran bats in complex forest landscapes — a pilot study from south-east Australia. Forest Ecology and Management, 85: 149–161. Google Scholar
  24. K. L. Murray , E. R. Britzke , and L. W. Robbins . 2001. Variation in search phase calls of bats. Journal of Mammalogy, 82: 728–737. Google Scholar
  25. M. K. Obrist 1995. Flexible bat echolocation: the influence of individual, habitat, and conspecifics on sonar design. Behavioral Ecology and Sociobiology, 36: 207–219. Google Scholar
  26. M. J. O'farrell , B. W. Miller , and W. L. Gannon . 1999. Qualitative identification of free-flying bats using the Anabat detector. Journal of Mammalogy, 80: 11–23. Google Scholar
  27. M. J. O'farrell , C. Corben , and W. L. Gannon . 2000. Geographic variation in the echolocation calls of the hoary bat (Lasiurus cinereus). Acta Chiropterologica, 2: 185–196. Google Scholar
  28. H. Parnaby 1992. An interim guide to identification of insectivorous bats of South-eastern Australia. Technical Reports of the Australian Museum, 8: 1–33. Google Scholar
  29. S. Parsons 1997. Search-phase echolocation calls of the New Zealand lesser short-tailed bat (Mystacina tuberculata) and long-tailed bat (Chalinolobus tuberculatus). Journal of Zoology (London), 75: 1487–94. Google Scholar
  30. S. Parsons , A. M. Boonman , and M. K. Obrist . 2000. Advantages and disadvantages of techniques for transforming and analyzing chiropteran echolocation calls. Journal of Mammalogy, 81: 927–938. Google Scholar
  31. L. K. Queale 1997. Field identification of female little brown bats Vespadelus spp. (Chiroptera: Vespertilionidae) in South Australia. Records of the South Australian Museum, 30: 29–33. Google Scholar
  32. L. Reinhold , A. Herr , L. Lumsden , T. Reardon C. Corben , B. Law , P. Prevett , G. Ford , L. Conole , A. Kutt , D. Milne , and G. Hoye . 2001a. Geographic variation in the echolocation calls of Gould's wattled bat Chalinolobus gouldii. Australian Zoologist, 31: 618–624. Google Scholar
  33. L. Reinhold , B. Law , G. Ford , and M. Pennay . 2001b. Key to the bat calls of south-east Queensland and north-east New South Wales. Forest Ecosystem Research and Assessment Technical Paper 2001-07, Department of Natural Resources and Mines, Queensland, 62 pp. Google Scholar
  34. D. Russo , G. Jones , and M. Mucedda . 2001. Influence of age, sex and body size on echolocation calls of Mediterranean and Mehely's horseshoe bats, Rhinolophus euryale and R. mehelyi (Chiroptera: Rhinolophidae). Mammalia, 65: 429–136. Google Scholar
  35. H-U. Schnitzler , and E. K. V. Kalko . 1998. How echolocating bats search and find food. Pp. 183–196, in Bat biology and conservation ( T. H. Kunz and P. A. Racey , eds.). Smithsonian Institution Press, Washington, D.C, 365 pp. Google Scholar
  36. M. Schulz 2000. Diet and foraging behavior of the golden-tipped bat, Kerivoula papuensis: a spider specialist. Journal of Mammalogy, 81: 948–957. Google Scholar
  37. R. Strahan (ed.). 1995. Mammals of Australia. Reed Books, Sydney, 756 pp. Google Scholar
  38. J. Sumner , and C. R. Dickman . 1998. Distribution and identity of species in the Antechinus stuartiiA. flavipes group (Marsupialia: Dasyuridae) in south-eastern Australia. Australian Journal of Zoology, 46: 27–41. Google Scholar
  39. D. W. Thomas , G. P. Bell , and M. B. Fenton . 1987. Variation in the echolocation call frequencies recorded from North American vespertilionid bats: a cautionary note. Journal of Mammalogy, 68: 842–847. Google Scholar
  40. N. Vaughan , G. Jones , and S. HARRIS . 1997. Habitat use by bats (Chiroptera) assessed by means of a broad-band acoustic method. Journal of Applied Ecology, 34: 716–730. Google Scholar
  41. R. A. Young , and G. I. Ford . 1998. Range extension of the little forest bat Vespadelus vulturnus (Chiroptera: Vespertilionidae) into a semi-arid area of central Queensland, Australia. Australian Zoologist, 30: 392–397. Google Scholar
© Museum and Institute of Zoology PAS
Bradley Stuart Law, Linda Reinhold and Michael Pennay "Geographic Variation in the Echolocation Calls of Vespadelus spp. (Vespertilionidae) from New South Wales and Queensland, Australia," Acta Chiropterologica 4(2), (1 December 2002).
Received: 25 March 2002; Accepted: 1 August 2002; Published: 1 December 2002

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