Behavioral Ecology and Sociobiology

, Volume 33, Issue 6, pp 415–428 | Cite as

Plasticity in echolocation signals of European pipistrelle bats in search flight: implications for habitat use and prey detection

  • Elisabeth K. V. Kalko
  • H.-U. Schnitzler


We studied the echolocation and hunting behavior of three aerial insectivorous species of bats (Vespertilionidae: Pipistrellus) in the field in order to characterize the signals used by the bats and to determine how call structure varies in relation to habitat structure (“uncluttered” versus “cluttered” space). We documented free-flying, naturally foraging wild pipistrelles in various habitats using multiflash stereophotography combined with simultaneous sound recordings. Then we reconstructed the bat's flight position in three-dimensional space and correlated it with the corresponding echolocation sequences. In all three species of pipistrelles, signal structure varied substantially. In echolocation sequences of the search phase we found a consistent association of signal types with habitat types. In uncluttered habitats (obstacles more than 5 m from the bat) pipistrelles emitted almost exclusively narrowband signals with bandwidths less than 15 kHz. In cluttered habitats (obstacles less than 5 m from the bat) they switched to signals with bandwidths of more than 15 kHz. Wideband signals were also used when the bats were turning in cluttered and uncluttered spaces and for an instant after turning away from obstacles. Prey detection occured only when the outgoing signal did not overlap with the returning echo from potential prey. The bats also avoided overlap of echoes from potential prey and obstacles. Based on the results of this study, we propose an overlap-free “window” within which pipistrelles may detect potential prey and which allows predictions of minimum distances to prey and clutter-producing objects.

Key words

Bats Echolocation Hunting behavior 


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  1. Ahlén I (1981) Identification of Scandinavian bats by their sounds (Report 6). Swedish University of Agricultural Sciences, Department of Wildlife Ecology, Uppsala, Sweden, pp 1–56Google Scholar
  2. Barclay RMR (1985) Long- versus short-range foraging strategies of hoary (Lasiurus cinereus) and silver-haired (Lasionycteris noctivagans) bats and the consequences for prey selection. Can J Zool 63:2507–2515Google Scholar
  3. Barclay RMR (1986) The echolocation calls of hoary (Lasiurus cinereus) and silver-haired (Lasionycteris noctivagans) bats as adaptations for long- versus short-range foraging strategies and the consequences for prey selection. Can J Zool 64:2700–2705Google Scholar
  4. Cahlander DA, McCue JJG, Webster FA (1964) The determination of distance by echolocating bats. Nature 201:251–544Google Scholar
  5. Emde Gvd, Menne D (1987) Discrimination of insect wingbeatfrequencies by the bat Rhinolophus ferrumequinum. J Comp Physiol A 164:663–671Google Scholar
  6. Emde Gvd, Schnitzler HU (1986) Fluttering target detection in Hipposiderid bats. J Comp Physiol A 159:756–772Google Scholar
  7. Fenton MB (1986) Design of bat echolocation calls: implications for foraging ecology and communication. Mammalia 2:192–203Google Scholar
  8. Fenton MB (1990) The foraging behaviour and ecology of animaleating bats. Can J Zool 86:411–422Google Scholar
  9. Griffin DR (1958) Listening in the dark. Yale University Press, New HavenGoogle Scholar
  10. Griffin DR, Webster FA, Michael CR (1960) The echolocation of flying insects by bats. Anim Behav 8:141–154Google Scholar
  11. Habersetzer J, Vogler B (1983) Discrimination of surface-structured targets by the echolocating bat Myotis myotis during flight. J Comp Physiol 152:275–282Google Scholar
  12. Helversen Ov (1989) Bestimmungsschlüssel fur die europäischen Fledermäuse nach äußeren Merkmalen. Myotis 27:41–60Google Scholar
  13. Horácek J, Hanák V (1986) Generic status of Pipistrellus savii and comments on classification of the genus Pipistrellus (Chiroptera, Vespertilionidae). Myotis 23–24:9–16Google Scholar
  14. Jones (1993) Flight performance, echolocation and foraging behavior in the noctule Nyctalus noctula. Bat Res News 34:23Google Scholar
  15. Kalko EKV (1991) Das Echoortungs- und Jagdeverhalten der drei europäischen Zwergfledermausarten, Pipistrelus pipistrellus (Schreber 1774), Pipistrellus nathusii (Keyserling et Blasius 1939) und Pipistrellus kuhli (Kuhl 1819), im Freiland, PhD thesis, University of Tübingen, Germany, pp 1–310Google Scholar
  16. Kalko EKV, Schnitzler HU (1989) The echolocation and hunting behavior of Daubenton's bat, Myods daubentoni. Behav Ecol Sociobiol 24:225–238Google Scholar
  17. Kober R, Schnitzler HU (1990) Information in sonar echoes of fluttering insects available for echolocating bats. J Acoust Soc Am 87:882–896Google Scholar
  18. Limpens HJGA, Helmer W, Winden A van, Mostert K (1989) Bats and linear landscape elements. Lutra 32:1–20Google Scholar
  19. Miller LA, Degn HJ (1981) The acoustic behavior of four species of vespertilionid bats studied in the field. J Comp Physiol 142:67–74Google Scholar
  20. Neuweiler G (1983) Echolocation and adaptivity to ecological constraints. In: Huber F, Markl H (eds) Neuroethology and behavioral physiology. Springer, Berlin Heidelberg New York, pp 280–302Google Scholar
  21. Neuweiler G (1984) Foraging, echolocation and audition in bats. Naturwissenschaften 71:446–455Google Scholar
  22. Neuweiler G (1990a) Auditory adaptations for prey capture in echolocating bats. Physiol Rev 70:615–641Google Scholar
  23. Neuweiler G (1990b) Foraging ecology and audition in echolocating bats. Trends Ecol Evol 4:160–166Google Scholar
  24. Pye D (1980) Adaptiveness of echolocation signals in bats. Trends Neuro Sci 3:232–235Google Scholar
  25. Racey PA, Swift SM (1985) Feeding ecology of Pipistrellus pipistrellus (Schreber) (Chiroptera: Vespertilionidae) during pregnancy and lactation. I. Foraging behavior. J Anim Ecol 54:205–215Google Scholar
  26. Roverud RC, Nitsche V, Neuweiler G (1991) Discrimination of wingbeat motion by bats, correlated with echolocation sound pattern. J Comp Physiol A 168: 259–263Google Scholar
  27. Rydell J (1986) Foraging and diet of the northern bat, Eptesicus nilssoni in Sweden, Holarct Ecol 9: 272–276Google Scholar
  28. Rydell J (1990) Behavioural variation in echolocation pulses of the Northern bat, Eptesicus nilssoni. Ethology 85: 103–113Google Scholar
  29. Schmidt S (1988) Evidence for a spectral basis of texture perception in bat sonar. Nature 331:617–619Google Scholar
  30. Schnitzler HU (1987) Echoes of fluttering insects: information for echolocating bats. In: Fenton MB, Racey P, Rayner JMV (eds) Recent advances in the study of bats. Cambridge University Press, Cambridge, pp 226–243Google Scholar
  31. Schnitzler HU, Henson OW Jr (1980) Performance of airborne animal sonar systems. I. Microchiroptera. In: Busnel RG, Fish JF (eds) Animal sonar systems. Plenum, New York, pp 109–181Google Scholar
  32. Schnitzler HU, Menne D, Kober R, Heblich K (1983) The acoustical image of fluttering insects in echolocating bats. In: Huber F, Markl H (eds) Neuroethology and behavioral physiology. Springer, Berlin Heidelberg New York, pp 235–250Google Scholar
  33. Schnitzler HU, Kalko E, Miller L, Surlykke A (1987) The echolocation and hunting behavior of the bat, Pipistrellus kuhli. J Comp Physiol A 161:267–274Google Scholar
  34. Schumm A, Krull D, Neuweiler G (1991) Echolocation in the notch-eared bat, Myotis emarginatus. Behav Ecol Sociobiol 28:255–261Google Scholar
  35. Simmons JA, Stein RA (1980) Acoustic imaging in bat sonar: echolocation signals and the evolution of echolocation. J Comp Physiol 135:61–84Google Scholar
  36. Simmons JA, Lavender WA, Lavender BA Childs JE, Hulebak K, Rigden MR Sherman J Woolman B O'Farrell MJO (1978) Echolocation by free-tailed bats (Tardarida). J Comp Physiol 125:291–299Google Scholar
  37. Simmons JA, Fenton MB, O'Farrell MJ (1979) Echolocation and pursuit of prey by bats. Science 203:16–21Google Scholar
  38. Sum YW, Menne D (1988) Discrimination of fluttering targets by the FM-bat Pipistrellus stenopterus? J Comp Physiol A 163:249–354Google Scholar
  39. Swift SM, Racey PA, Avery MI (1985) Feeding ecology of Pipistrellus pipistrellus (Chiroptera: Vespertilionidae) during pregnancy and lactation. II. Diet. J Anim Ecol 54:217–225Google Scholar
  40. Weid R, Helversen Ov (1987) Ortungsrufe europäischer Fledermäuse beim Jagdflug im Freiland. Myotis 25:5–27Google Scholar
  41. Zbinden K (1989) Field observations on the flexibility of the acoustic behavior of the european bat Nyctalus noctula (Schreber 1774). Rev Suisse Zool 96:335–343Google Scholar
  42. Zingg PE (1990) Eine Methode zur akustischen Artidentifizierung von Fledermäusen (Mammalia: Chiroptera) und ihr Einsatz bei der Ermittlung der Artvorkommen im Val Bregaglia (GR). PhD thesis, University of Genf, Switzerland, pp 1–82Google Scholar

Copyright information

© Springer-Verlag 1993

Authors and Affiliations

  • Elisabeth K. V. Kalko
    • 1
  • H.-U. Schnitzler
    • 1
  1. 1.Animal PhysiologyUniversity of TübingenTubingenGermany

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