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Mammalian Biology

, Volume 81, Issue 1, pp 40–45 | Cite as

Winter foraging activity of Central European Vespertilionid bats

  • Andreas ZahnEmail author
  • Eva Kriner
Original Investigation

Abstract

The winter activity of bats was studied in an area of Bavaria, Southern Germany, for seven consecutive years (2007–2013). Echolocation calls were recorded in known foraging areas between October and March of each winter, and bats were regularly seen on evenings with temperatures above +6°C, except for the period between mid-December and mid-February, when even bouts of warm weather did not appear to trigger foraging activity. Below +3 ° C no bats appeared in the foraging areas. The most frequently recorded species were Nyctalus noctula, Pipistrelluspipistrellus, Pipistrellus nathusii and Vespertilio murinus. Final buzzes indicating attempts to catch prey were recorded for these species even in December and February, which supports the idea that the bats were not only in search of water or just moving between roosts. Myotis species, on the other hand, which hibernate in roosts offering more constant temperature conditions, were not observed at all between mid-November and March. Further investigations have to show whether warmer winter evenings offer bats an opportunity for casual hunting or whether winter foraging expresses an urgent need for weak individuals.

Keywords

Bats Winter Foraging Temperature Insects 

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Copyright information

© Deutsche Gesellschaft für Säugetierkunde 2014

Authors and Affiliations

  1. 1.Department ofBiologie IIUniversity of Munich, GrosshadernerstrMunichGermany

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