Field Survey
Based on the data received for 2023, 106 volunteers carried out the Field Survey at 179 sites. This survey involves walking a triangular transect within a 1km square and counting noctule, serotine, common pipistrelle and soprano pipistrelle passes.
Noctule and Leisler's bat
![Field Survey](https://cdn.bats.org.uk/uploads/images/Field-Survey_Noct_Leisler_2024-02-12-104633_hzef.png?v=1707734822)
Noctules were recorded at 103 sites in Great Britain (57.5% of sites surveyed). Leisler's were recorded at two out of four sites in Northern Ireland.
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Serotine
![Field Survey](https://cdn.bats.org.uk/uploads/images/Field-Survey_Serotine_2024-02-29-112323_nbrj.png?v=1709205822)
Serotines were recorded at 45 sites (22.4% of sites surveyed).
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Common pipistrelle
![Field Survey](https://cdn.bats.org.uk/uploads/images/Field-Survey_Common-pip.png?v=1707737490)
Common pipistrelles were recorded at 160 sites (89.4% of sites surveyed).
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Soprano pipistrelle
![Field Survey](https://cdn.bats.org.uk/uploads/images/Field-Survey_Soprano-pip.png?v=1707737891)
Soprano pipistrelles were recorded at 110 sites (61.5% of sites surveyed).
View enlarged map here.