Thread subject: Diptera.info :: Icelandic Syrphus torvus 2
Posted by sbushes on 23-05-2023 16:13
#1
...
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
...
Edited by sbushes on 23-05-2023 16:19
Posted by sbushes on 23-05-2023 16:14
#2
...
Posted by sbushes on 23-05-2023 16:15
#3
...
Posted by sbushes on 23-05-2023 16:15
#4
...
Posted by sbushes on 23-05-2023 16:17
#5
...
Edited by sbushes on 23-05-2023 16:17
Posted by sbushes on 23-05-2023 16:20
#6
Correctly showing femur 3 basal 3/4 black?
( not sure quite what the adpressed hairs look like or if they should be visible )
Posted by eklans on 23-05-2023 16:51
#7
Clearly
¾ - the alternative,
S. vitripennis, has only
⅔ 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!
Posted by Karsten Thomsen on 23-05-2023 21:13
#8
Incredibly dark specimen.
Posted by sbushes on 23-05-2023 22:02
#9
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.