This 26 June 2015 video was recorded by Niels de Zwarte early in the morning in a city park in Leiden, the Netherlands.
It shows a colony of common noctule bats, in a hole in a tree.
This 26 June 2015 video was recorded by Niels de Zwarte early in the morning in a city park in Leiden, the Netherlands.
It shows a colony of common noctule bats, in a hole in a tree.
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