Diptera.info :: Identification queries :: Diptera (adults)
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 Tachinid of today 1: Gonia picea
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| Sundew |
Posted on 15-03-2020 23:08
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 Member Location: Berlin and Baden-Württemberg, Germany Posts: 3915 Joined: 28.07.07 |
Hi, Today I saw three Tachinids in a flowering population of Draba verna (formerly Erophila verna), Brassicaceae. The location is in southwestern Germany, about 20 km west of Stuttgart. The shown species should be Gonia picea as to early flight time and colour of the abdomen. Do you agree? Thanks, Sundew Sundew attached the following image:  [292.82Kb] Edited by Sundew on 16-03-2020 18:34 |
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| Sundew |
Posted on 15-03-2020 23:09
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Member Location: Berlin and Baden-Württemberg, Germany Posts: 3915 Joined: 28.07.07 |
More pics.
Sundew attached the following image:  [277.17Kb] |
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| Zeegers |
Posted on 16-03-2020 12:27
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Member Location: Soest, NL Posts: 18787 Joined: 21.07.04 |
Yes. Theo |
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| Sundew |
Posted on 16-03-2020 18:37
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Member Location: Berlin and Baden-Württemberg, Germany Posts: 3915 Joined: 28.07.07 |
A cool fly, nice to know it - thanks for confirmation! BTW: how can we tell apart the sexes? The "big feet = male" rule of thumb doesn't work here... |
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| Sundew |
Posted on 16-03-2020 19:54
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Member Location: Berlin and Baden-Württemberg, Germany Posts: 3915 Joined: 28.07.07 |
Meanwhile I found a paper by Zeller (1842) who states that the length ratio of the antennal segments 2 and 3 is decisive. In males, the 3rd antennal segment is about four times as long as the second. In females, the 2nd antennal segment is about half as long as the third. If so, I have photographed a female. |
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| Zeegers |
Posted on 16-03-2020 20:08
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Member Location: Soest, NL Posts: 18787 Joined: 21.07.04 |
Yes, all is correct. Theo |
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| Sundew |
Posted on 16-03-2020 20:44
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Member Location: Berlin and Baden-Württemberg, Germany Posts: 3915 Joined: 28.07.07 |
Great - it is a delight to gather knowledge. Thanks again! |
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