Behavioral Ecology and Sociobiology

, Volume 47, Issue 6, pp 400–412

Natterer’s bat (Myotis nattereri Kuhl, 1818) hawks for prey close to vegetation using echolocation signals of very broad bandwidth

  • B. M. Siemers
  • H. -U. Schnitzler
Original Article

DOI: 10.1007/s002650050683

Cite this article as:
Siemers, B. & Schnitzler, H. Behav Ecol Sociobiol (2000) 47: 400. doi:10.1007/s002650050683

Abstract 

We present a hitherto unknown prey perception strategy in bats: Myotis nattereri (Vespertilionidae, Chiroptera) is able to perceive prey by echolocation within a few centimeters of echo-cluttering vegetation, by using frequency-modulated search signals of very large bandwidth (up to 135 kHz). We describe the species’ search behavior and echolocation repertoire from the field and from experiments in a flight tent. In the field, bats varied signal parameters in relation to their distance from vegetation and usually flew close to vegetation. In the flight tent, M. nattereri detected and localized prey by echolocation alone as close as 5 cm from vegetation. Apparently, the bats were able to tolerate some overlap between prey and clutter echoes. Passive prey cues (vision, olfaction, prey-generated sounds) were not used in prey perception. The bats selected prey by size. The animals performed aerial catches and produced approach sequences typical for aerial hawking bats, but were able to do so within a few centimeters of the substrate. M. nattereri thus has access to silent, suspended prey very close to vegetation (e.g., spiders, and caterpillars on threads).

Key words Prey perceptionSensory ecologyPrey selectionClutterMyotis

Copyright information

© Springer-Verlag Berlin Heidelberg 2000

Authors and Affiliations

  • B. M. Siemers
    • 1
  • H. -U. Schnitzler
    • 1
  1. 1.Department of Animal Physiology, Zoological Institute, University of Tübingen, Auf der Morgenstelle 28, 72076 Tübingen, Germany e-mail: bjoern.siemers@uni-tuebingen.de Tel: +49-7071-2978877, Fax: +49-7071-292618DE