My first bat survey for field study of OU S159.
Detected Common and Soprano Pipistrelles emerging from roosting sites.
No interactions present.
Your description is right but can you give a little more detail, for example, at what frequency did you hear the slapping noise? Why do you think you have both pipistrelle?
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Lat/Lng: 53.0312, -1.0356
OS grid ref: SK647486
Survey undertaken in churchyard to record bats leaving roosting sites. Church surrounded by farmland. Mature trees alongside footpath.