One of two species of water beetles found in river survey.This one was very patterned
No interactions present.
I am wondering if it could be Nebrioporus (Nebrioporus) depressus elegans? This is going by the markings shown in Friday's key.
I don't have that key and looking on-line they are too similar for me to separate. Should have left it at genus. :-)
If the key points to the salient features then please do post a revision.
Going by the locality in Southern England I would say this is more likely to be N.elegans or N depressus/elegans.
Tachinid Recording Scheme
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Having now seen the key I agree. Thanks for the correction.
Lat/Lng: 51.2, -1.5
OS grid ref: SU3646