Diptera.info :: Identification queries :: Diptera (adults)
 Tabanus sp.
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| Brian Stone |
Posted on 17-07-2007 10:53
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Member Location: Posts: 7 Joined: 27.06.07 |
Could anyone confirm the identity of this largish Tabanus. I was thinking autumnalis. Location: Peterborough, UK Date: 26 June2007 Habitat: scrub and trees on edge of grassy disused brickworks Size: c.30mm long Brian Stone attached the following image:  [71.73Kb] |
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| Brian Stone |
Posted on 17-07-2007 10:55
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Member Location: Posts: 7 Joined: 27.06.07 |
Second shot
Brian Stone attached the following image:  [75.69Kb] |
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| Brian Stone |
Posted on 17-07-2007 10:55
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Member Location: Posts: 7 Joined: 27.06.07 |
Finally head on.
Brian Stone attached the following image:  [72.19Kb] |
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| Susan R Walter |
Posted on 17-07-2007 12:54
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 Member Location: Touraine du Sud, central France Posts: 1802 Joined: 14.01.06 |
30mm is getting awfully big for T autumnalis I think. The biggest I have seen is c25mm. Also the base of the antennae seem quite pale, but it looks like the abdominal pattern is right, which I think is the most important character and there is no eye banding, so I think I would go for T autumnalis too. Anyway, I am sure Theo will set us right if it is something else. Susan |
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| Brian Stone |
Posted on 17-07-2007 14:56
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Member Location: Posts: 7 Joined: 27.06.07 |
Thanks Susan. Worth noting my size estimate may be on the generous side. They look jolly large and it's hard to be objective on size. |
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| caliprobola |
Posted on 17-07-2007 15:02
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Member Location: Belgium Posts: 211 Joined: 24.05.07 |
well, i heard of people estimating Volucella zonaria as a fly of minimum 5cm so yours isn't too bad....  |
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| Zeegers |
Posted on 17-07-2007 18:28
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Member Location: Soest, NL Posts: 19299 Joined: 21.07.04 |
Right. It's Tabanus autumnalis. The third antennel segment is completely black, so I don't see a problem there. The second is not, but that's OK. Moreover, the abdominal pattern is unique (in itself a near unique feature in Tabanus). Autumnalis is big, but it ends at 22 mm. Sudeticus gets 5 mm. bigger, which is even to the naked eye much bigger. To see even bigger Tabanus, really 30 mm., go to the USA (T. americanus). Looks almost like a bird. Theo |
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| Brian Stone |
Posted on 18-07-2007 11:56
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Member Location: Posts: 7 Joined: 27.06.07 |
Thanks Theo. Shame my size estimate was so far off. |
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| Zeegers |
Posted on 18-07-2007 13:26
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Member Location: Soest, NL Posts: 19299 Joined: 21.07.04 |
NO shame, visual illusion I would call it. The correction factor 2/3 is actually rather average. Theo |
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