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Diptera.info :: Identification queries :: Diptera (adults)
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Chironomidae swarming on water surface
mwkozlowski
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Posted on 15-04-2018 20:38
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Location: Warsaw, Poland
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from my post from some years ago,
https://diptera.info/forum/viewthread.php?thread_id=46548
I have learned that this rute is chararcteristic for Tanytarsini
Here is suppsingly another species from the same site, swarming in numbers some 10 days ago, but "propelling" by wings rather then gliding on the surface. Possible sp. identification?
(of course not Asilidae bu I can not change the place by edit)
mwkozlowski attached the following image:


[210.67Kb]
Edited by mwkozlowski on 15-04-2018 20:41
very general entomologist
 
mwkozlowski
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Posted on 15-04-2018 20:42
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second
mwkozlowski attached the following image:


[181.71Kb]
very general entomologist
 
Tony Irwin
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Posted on 15-04-2018 22:37
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Were these found near salt water? They look like Telmatogetoninae to me.
Tony
----------
Tony Irwin
 
mwkozlowski
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Posted on 17-04-2018 18:49
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not at all, it was a small lake inside forest, Mazury Poland
very general entomologist
 
John Carr
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Posted on 20-04-2018 02:54
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There are a few Orthocladiinae adapted to ground (or water surface) mating. These show the typical non-swarming adaptations, with reduced antennae, short legs, and enlarged hypopygium (see shadow at left of first photo).

The low front leg ratio rules out Tanytarsini and the wings are consistent with Orthocladiinae.

 
http://www.flickr.com/photos/31715949@N00
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