This video from the USA says about itself:
7 April 2012
I talk about where bats go in the winter. Some hibernate, some migrate, some hang around and hide in anything from attics to farm equipment. I also briefly touch on White Nose Syndrome.
Warden Thijmen van Heerde reports today about a ‘bat hotel’ in the Ooijpolder nature reserve near Nijmegen city in Gelderland province in the Netherlands. The ‘hotel’ is an old oven, reconstructed to accommodate wintering bats.
This year, 41 Daubenton’s bats, six whiskered bats and six brown long-eared bats winter there.
Dutch bats flying in January 2016: here.
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