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Sandy
Joined: 22 Jul 2008 Posts: 135 Location: East Lothian
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Posted: Sat Aug 15, 2009 7:49 pm Post subject: Threipmuir trio |
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Hi hoverfly experts
On a recent visit to Threipmuir reservoir near Edinburgh I photographed three hoverflies which I may or may not have correctly identified.
I suspect these are:
Eriozona erratica (Megasyrphus annulipes)
Chrysotoxum arcuatum
Platycheirus granditarsus (Pyrophaena granditarsa)
If it's possible from these photos could anyone please confirm or correct these ids.
Thanks in advance,
Sandy |
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Ian Andrews
Joined: 08 Aug 2007 Posts: 180 Location: Pocklington, East Yorkshire
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Posted: Sat Aug 15, 2009 9:03 pm Post subject: |
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Sandy
Nice photos...you are finding a lot of good hoverflies!
Your Eriozona is, I believe, Sericomyia silentis, with wedge-shaped yellow bars, rather than bands, on the tergites.
Ian |
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Sandy
Joined: 22 Jul 2008 Posts: 135 Location: East Lothian
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Posted: Sun Aug 16, 2009 4:32 am Post subject: |
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Ian Andrews wrote: |
Sandy
Nice photos...you are finding a lot of good hoverflies!
Your Eriozona is, I believe, Sericomyia silentis, with wedge-shaped yellow bars, rather than bands, on the tergites.
Ian |
Thanks Ian. I hadn't considered Sericomyia. The few individuals of that species I'd seen previously had all been large bulky flies. This was more in the size range of Syrphus - Scaeva. I've posted a side view of the fly in question.
Sandy |
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Roger K.A. Morris
Joined: 06 Nov 2005 Posts: 1652
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Posted: Sun Aug 16, 2009 7:59 am Post subject: |
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Hello Sandy
Ian is correct in S. silentis. Your other two ID are correct.
It would be great to have the data.
Just as a general point, Stuart and I are hoping to produce an updated atlas in time for the 6th International Symposium on Syrphidae which will be held in Glasgow in 2011. We also hope that sufficient copies will be produced to to provide copies to recent contributors who have made a significant contribution to the dataset. We think this is likely to be people who have contributed 150 or more records. At the rate you are going it looks like you could be eligable - we would be delighted if you were. So, if you would be willing to think about keeping records of what you see, then you are likely to make quite an important contruibution. Your area is not terribly well recorded and even records of the commoner and more easily identifiable species would make a big difference. I think you are showing excellent caution in your ID - so we would be happy to accept records of easily ID species without corroborating specimens/photos.
Kindest regards
Roger
P/S, the same holds for Ian |
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Sandy
Joined: 22 Jul 2008 Posts: 135 Location: East Lothian
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Posted: Sun Aug 16, 2009 8:22 pm Post subject: |
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Thanks for the vote of confidence.
At the moment I just have lots of photographs with details of places and dates but I plan to try and organise the records using excel.
Here's the details of the above species:
RECORDS
Name of the species: Sericomyia silentis
Date of the observation: 05/08/2009
Grid reference: NT161637
Location name: Red Moss SWT Reserve, Balerno
Vice-county: Midlothian
Recorder's name: S. Rae
Determiner's name: Ian Andrews
Other information: Single Sericomyia on a umbellifer head(species?) for around 30 seconds. Apparently warming up rather than feeding. Habitat small trees surrounded by peat bog.
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Name of the species: Chrysotoxum arcuatum
Date of the observation: 05/08/2009
Grid reference: NT164637
Location name: Red Moss SWT Reserve, Balerno
Vice-county: Midlothian
Recorder's name: S. Rae
Determiner's name: Roger K. A. Morris
Other information: Individual on a grass stem in a marshy ditch seen from the nature reserve's boardwalk.
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Name of the species: Platycheirus granditarsus
Date of the observation: 05/08/2009
Grid reference: NT164637
Location name: Red Moss SWT Reserve, Balerno
Vice-county: Midlothian
Recorder's name: S. Rae
Determiner's name: Roger K. A. Morris
Other information: Individual on a grass stem in a marshy ditch, around a foot away from the above Chrysotoxum.
Thanks,
Sandy |
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