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Diptera.info » Identification queries » Other insects, spiders, etc.
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Water measurer - Hydrometra stagnorum
nick upton
I think this stick insect-like bug has to be Hydrometra stagnorum - water walking with a springtail it is sucking. The only other UK species is rare and further to the east than I live.

Wiltshire, southwest UK 17.4.10
Nick Upton - naturalist and photographer
 
nick upton
Another view of this water measurer on the water surface of a stream
Nick Upton - naturalist and photographer
 
atylotus
Dear Nick
I think you're right. I even think that I can see the teeth at the posterior edge of the sternites 6 and 7 which makes it a male H. stagnorum. Besides this, the specimen is not as reddish brown as I'm used to see in H. gracilenta, but more blackish brown as in H. stagnorum.
 
nick upton
OK, many thanks for this helpful feedback.
Nick Upton - naturalist and photographer
 
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12 July 2025 11:24
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