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Diptera.info :: Family forums :: Syrphidae
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Icelandic Syrphus torvus 2
sbushes
#1 Print Post
Posted on 23-05-2023 16:13
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...

Follow-up to other post, to see if this shows the femur coloration necessary for triple-checking?

Observed Reykjavik 22nd May 2023

Presumed to be S.torvus as with the other... but markings noted as being irregular

Other post here
https://diptera.i..._id=109874

iNaturalist listing
https://www.inatu.../163168857


...
sbushes attached the following image:


[155.03Kb]
Edited by sbushes on 23-05-2023 16:19
 
sbushes
#2 Print Post
Posted on 23-05-2023 16:14
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sbushes
#3 Print Post
Posted on 23-05-2023 16:15
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sbushes
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Posted on 23-05-2023 16:15
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sbushes
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Posted on 23-05-2023 16:17
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Edited by sbushes on 23-05-2023 16:17
 
sbushes
#6 Print Post
Posted on 23-05-2023 16:20
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Correctly showing femur 3 basal 3/4 black?
( not sure quite what the adpressed hairs look like or if they should be visible )
 
eklans
#7 Print Post
Posted on 23-05-2023 16:51
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Clearly ¾ - the alternative, S. vitripennis, has only black.
And to be honest, I also have never seen the adpressed hairs on my photos... In my opinion - based on van Veen's key - your fly is S. torvus!
Greetings, Eric Kloeckner
 
Karsten Thomsen
#8 Print Post
Posted on 23-05-2023 21:13
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Incredibly dark specimen.
 
https://www.flickr.com/photos/94052068@N06/collect
sbushes
#9 Print Post
Posted on 23-05-2023 22:02
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Repeating what I stated on the parallel thread for clarity :

...other observations of hoverflies in Iceland have been noted as being dark on iNaturalist. When I raised this with Erling Olafsson at the National Institute here, he said it was very typical for Icelandic specimens that they would be darker than their continental equivalents.
 
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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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