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#1 2012-07-25 23:34:00

Gateside
DF Members
Name: Nigel Gilligan
From: Cumbria
Registered: 2011-08-26
Posts: 1045

Tabanus sudeticus or bovinus maybe

Am I right in thinking that this is a female, and therefore separation between T. sudeticus and T. bovinus is impossible.  My insect book suggests that the triangles are shorter and more distinct in sudeticus.

Size - about 25 mm.  (i.e. intimidating, especially when i get buzzed very deliberately when trying to get a closer photo!)

Thanks
Nigel


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#2 2012-07-26 17:11:22

Mark
DF Members
Name: Mark Mitchell
From: Hampshire
Registered: 2008-06-17
Posts: 273

Re: Tabanus sudeticus or bovinus maybe

looking in Chvala & Lyneborg (1972) this is a good fit for T. sudeticus, also T. bovinus is quite a rare beasty in the UK.

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#3 2012-07-26 20:10:49

Gateside
DF Members
Name: Nigel Gilligan
From: Cumbria
Registered: 2011-08-26
Posts: 1045

Re: Tabanus sudeticus or bovinus maybe

Hi Mark
My doubts and caution stem from a previous thread of mine.  I don't know for sure whether my previous one was no use because I only had an underside view, or it's not considered possible to separate, even though T. bovinus is totally unlikely.

My previous thread is at
http://www.dipteristsforum.org.uk/t2418 … awfly.html

Is it one of those cases where I still can't record a single species.
I await adjudication on this one!

Nigel

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#4 2014-01-20 03:44:29

haematocephalus
DF Members
Name: Martin Harvey
From: Buckinghamshire
Registered: 2008-02-27
Posts: 267
Website

Re: Tabanus sudeticus or bovinus maybe

Nigel, a very belated response to this thread from me! I'd be happy to record that as T. sudeticus, the abdominal markings are entirely characteristic of that species. I was looking at specimens of T. bovinus at the Natural History Museum yesterday, and they are noticeably paler (more orange) than the photos here. If you ever find a pale one we'd need to keep the specimen before being able to claim it as bovinus, but for specimens that look like typical sudeticus, as this one does, I'm happy to accept the record.


Soldierflies and Allies Recording Scheme
http://www.brc.ac.uk/soldierflies-and-allies/

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#5 2014-01-20 11:49:37

Gateside
DF Members
Name: Nigel Gilligan
From: Cumbria
Registered: 2011-08-26
Posts: 1045

Re: Tabanus sudeticus or bovinus maybe

Hi Martin

I had entirely forgotten about this one!

In fact I had 5 good examples last summer (2013) in my own garden, where I managed to get very detailed photos. (and they do seem rather common around here). One was confirmed by Malcolm Smart, and since they were all clearly out the same mould (except for the sex), I identified the rest myself. (and assume that doesn't cause them to be rejected!).

I found Steve Falk's guide to this species and similar ones very useful.

best wishes
Nigel

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#6 2014-01-20 14:50:55

malcolmsmart
Committee
Name: Malcolm Smart
From: Wolverhampton
Registered: 2008-02-26
Posts: 395

Re: Tabanus sudeticus or bovinus maybe

The fact is that T. sudeticus is actually quite common in some parts of the country, while the very similar T. bovinus is extremely rare. It would be utterly wrong to record T. bovinus without having a specimen to be checked by a specialist (the current best persons in Britain probably being Andrew Grayson, Martin Harvey or Steven Falk). A record of bovinus could not be verified from just a photograph.

The implication of the thread above is that a false record of T. bovinus could give a very misleading impression of its distribution and the need for conservation measures at a particular site, whereas a false record for T. sudeticus would in most cases not significantly impact on our understanding of its overall distribution or conservation status. Records of T. sudeticus need not be subjected to such serious scrutiny before acceptance.
I hope that this is helpful.
Malcolm

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#7 2014-01-20 17:59:32

Gateside
DF Members
Name: Nigel Gilligan
From: Cumbria
Registered: 2011-08-26
Posts: 1045

Re: Tabanus sudeticus or bovinus maybe

Yes, I'm happy with that, Malcolm.

Nigel

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