BLAGDON LAKE BIRDS

Brandt's Bat


Brandt's Bat Myotis brandtii [Eversmann, 1845]

(Accidental, resident)

Brandt's Bat Myotis brandtii, Ash Tree © Nigel Milbourne, 2013

The echolocation frequency of maximum energy (FM call) peaks at 46.7 kHz (range 38.0-78.4) with an inter-pulse interval of 88.0 ms (range 56.7-161) and call duration of 3.5 ms (range 1.5-5.0).

Normal weight 5-7g, Forearm length 33.0-38.2 mm, Fifth finger length 40-49 mm, Third finger length 48-61 mm.

Other identification features: Male penis shape and dentition are reliable factors, while tragus and nostril shape may help with identity but are variable.

Bibliography (sources of information)

Bat Conservation Trust website

Dietz, C., Helverson, O. von, Nill, D. 2009. Bats of Britain, Europe and Northwest Africa. A&C Black Publishers Ltd., London.

Fisher, J., Francis, J. & Jones, Prof G. The Bats of Britain (an online guide). University of Bristol, School of Biological Sciences website

Russ, J. 2012. British Bat Calls A Guide to Species Identification. Pelagic Publishing, Exeter.


Updated 20 May, 2013