Colymbetes fuscus
I seem to be finding these more often recently than I used to. Some of the recent ones were identified using Duff's key and Mike Hackston's but the older ones were only using Mike Hackston's keys.
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Colymbetes fuscus, North Elmham (Norfolk, UK), 13th August 2022
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Colymbetes fuscus, North Elmham (Norfolk, UK), 14th August 2022
Colymbetes fuscus, North Elmham (Norfolk, UK), 25th August 2022
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Colymbetes fuscus, North Elmham (Norfolk, UK), 29th December 2021
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Colymbetes fuscus, North Elmham (Norfolk, UK), 6th August 2018
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Colymbetes fuscus, North Elmham Cathedral Meadows (Norfolk, UK), 25th May 2019