building bat boxes

Somewhere around 2003 I came into contact with Ulrich, who has interested in attracting bats by building bat boxes. He thought that there were enough wooden boxes around and started making a different box by mixing saw dust and concrete (I am still not sure about the correct translation – the material could be called „composite wood“, but I also found the description „woodcrete“).

For quite some time his step-by-step instructions were available in german only, but Eric Vidacovich from Texas put a lot of work into an english translation. Here is the downloadable PDF-document:


also bird boxes can be built with the help of the above instructions and this video shows some residents…

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