Balkan Blue

This 7-minute film of a noctule 'mating roost' is condensed from over two hours of footage. The bat began 'singing' at 75 minutes following sunset and sang sporadically. There was a good deal of social 'chatter' with other bats that also visited the roost but the occupant was still alone when I left. It is interesting to see that the bat remained out of view while singing; a phenomenon that was described to me by bat workers in Holland and Belgium but that I had not witnessed before. Coincidenta