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Daubenton's Bat Passes

It can often be difficult to count the exact number of Daubenton's bat passes, especially if a bat is remaining close to a certain spot to feed or there is more than one present. However, please do try and give an estimate.

Identifying Daubenton's Bat

To recap:

  • Daubenton's bats have a very distinctive flight pattern just above the surface of the water
  • On a heterodyne detector their calls sound like a series of rapid, dry clicks with quite a regular rhythm
  • However the sound is very similar to other Myotis bats (e.g. whiskered, Brandt's and Natterer's bat)
  • Therefore record as a Daubenton's bat pass only if you hear the bat AND see it flying low over the water
  • If you hear the right type of bat call but do not see the bat then record as "Unsure Daubenton's bat"

Other species heard when tuned to 35kHz

You may also hear the following species on your detector:

  • Other Myotis species
  • Common pipistrelle
  • Nathusius' pipistrelle
  • Barbastelle
  • Big bats (noctule, Leisler's bat and serotine)

You should not record these as part of this survey but it is useful to be able to recognise them. We will look at these species on the next few pages.

 

planning your survey
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after your survey
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Don't forget other species sound similar and you need to get a visual identification too through observing the bat flying close to the surface of the water

 

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