Very large Brown Beetle, found on a stem next to a small burn, which runs into a pond.
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Thank you of your ID Help, its a large impressive Beetle.
I have been on the Cree Valley Trust Site, which looks after Knockman wood, it has D. marginalis. Great Diving Beetle. Listed. Thank you.
Lat/Lng: 54.9, -4.5
OS grid ref: NX4067