What is this small beetle, living on the surface of our pond, making rapid movements? Is it a Whirlygig Beetle? It is the small beetle in the centre of the picture, not the large beetle at the bottom.
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You are correct it is a whirlygig beetle and it is in the family Gyrinidae. I could not tell you which species though.
Thank you very much. GPYATT
Lat/Lng: 55.6, -3.3
OS grid ref: NT2136