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Diptera.info :: Identification queries :: Diptera (adults)
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Ephydridae Hydrellia? mite removal service
Stephen R
#1 Print Post
Posted on 15-06-2009 19:43
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Location: Clitheroe Lancashire UK
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Am I right on this? I struggled a bit even to settle on the family. If it is Hydrellia, I have learnt from previous threads not to expect a species determination Wink These flies have been in my mother's garden in Yorkshire at least for the past few weeks. There is no standing water. They always seem to be within about 300mm of the ground, which is well covered by plants. They seem to favour Alchemilla mollis. See below for some feeding behaviour.
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Edited by Stephen R on 15-06-2009 20:01
 
Stephen R
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Posted on 15-06-2009 19:45
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Another view:
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Stephen R
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Posted on 15-06-2009 19:47
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and the face:
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[91.12Kb]
 
Stephen R
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Posted on 15-06-2009 19:52
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I watched one of them jump on a small nematoceran which then seemed to escape. When I got the photos home I found that it was stripping it of mites then letting it go. Quite a useful valeting serviceSmile
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Edited by Stephen R on 15-06-2009 20:05
 
Stephen R
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Posted on 15-06-2009 19:56
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Sorry about the shaky picture
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Stephen R
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Posted on 15-06-2009 19:59
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Cleaned up and ready for release:
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pwalter
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Posted on 15-06-2009 20:15
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Never heard of this. Really interesting observation. Could never have tought of this... All the cecidomyiids left the fly alive? Do the last 2 photos show the same pair (same fly - same cecid?)
 
Stephen R
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Posted on 15-06-2009 21:06
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Yes, the last three pictures are all of the same event. I only saw this happen once, and the 'victim' got up and flew away. I got the pictures because I use the camera as a field lens - my eyes are not good enough to see what's going on at this scaleFrown
 
Tony Irwin
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Posted on 15-06-2009 21:49
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Looks like Hydrellia griseola - that's the most likely species to be found away from water, as the larva mines terrestrial plants - most species are breed in aquatic or emergent vegetation.
As for the feeding habit - I'll check this one out and get back to you!
Tony
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Tony Irwin
 
Stephen R
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Posted on 16-06-2009 19:19
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Thanks Tony, it's very good to have a species! Next time I go to my mother's I'll have a look for nearby leaf mines. Any particular plant it likes?
 
Tony Irwin
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Posted on 16-06-2009 20:54
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I can give you a list of about fifty species! Grasses and emergent vegetation generally - the mines are difficult to spot (not as obvious as agromyzid mines).
Tony
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Tony Irwin
 
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Some flies preserved in ethanol and then pinned often get the eyes sunken, how can this be avoided? Best answer: I usually keep alcohol-collected material in alcohol

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