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Diptera.info :: Identification queries :: Diptera (adults)
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Musca osiris male & female (and M. autumnalis)
eklans
#1 Print Post
Posted on 08-07-2026 18:29
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Location: Franconia, Germany
Posts: 4745
Joined: 11.11.18

 Ansbach, 2026-07-06 and 07, garden near old deciduous forest in Frankenhoehe Nature Park
6th: a male Musca osiris on Euonymus japonicus
7th: a female Musca osiris? (not totally sure - there's little to compare...)

EDIT both are M. osiris!
EDIT + M. autumnalis
eklans attached the following image:


[53.74Kb]
Edited by eklans on 11-07-2026 11:21
 
eklans
#2 Print Post
Posted on 08-07-2026 18:29
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Location: Franconia, Germany
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 ♂
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[76.24Kb]
 
eklans
#3 Print Post
Posted on 08-07-2026 18:32
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 ♀Musca autumnalis
eklans attached the following image:


[84.87Kb]
Edited by eklans on 11-07-2026 11:22
 
eklans
#4 Print Post
Posted on 08-07-2026 18:33
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 ♀Musca autumnalis
eklans attached the following image:


[69.36Kb]
Edited by eklans on 11-07-2026 11:22
 
eklans
#5 Print Post
Posted on 08-07-2026 18:33
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 ♀Musca osiris
eklans attached the following image:


[59.39Kb]
Edited by eklans on 11-07-2026 11:23
 
eklans
#6 Print Post
Posted on 08-07-2026 18:34
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 ♀Musca osiris
eklans attached the following image:


[68.6Kb]
Edited by eklans on 11-07-2026 11:24
 
eklans
#7 Print Post
Posted on 08-07-2026 18:34
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 ♀Musca autumnalis
eklans attached the following image:


[81.11Kb]
Edited by eklans on 11-07-2026 11:24
Greetings, Eric
 
Zeegers
#8 Print Post
Posted on 09-07-2026 15:43
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 Yes, both OK for me for osiris.


Theo
 
eklans
#9 Print Post
Posted on 09-07-2026 18:28
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 Thank you very much, Theo! Isis et Osiris te salutant!
Greetings, Eric
 
Nikita Vikhrev
#10 Print Post
Posted on 11-07-2026 07:37
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 I think that female M. osiris is only photo N5
Nikita Vikhrev - Zool Museum of Moscow University
 
eklans
#11 Print Post
Posted on 11-07-2026 11:30
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 Thank you Nikita, for your constructive critique!
My photos of the female are from July 7th and belong to 2 sessions:
First (including image 5 and 6) from 11:31:14 to 11:33:52 - pretty sure, that it's the same fly female Musca osiris. If you compare the dc-bristles on these 2 images you will find the same pattern.
Second (including 3, 4, 7) from 15:09:26 to 15:10:53. When checking it again intensively, I think this female is a small Musca autumnalis (abdomen is not uniformly grey and all 4 dcs are distinct.
The hairy eyes of the very lively M. osiris female are hard to see on a photo - especially if it's stormy, but on #5 the pilosity is visible.

I have modified title and subtitles of this thread accordingly.
Greetings, Eric
 
Nikita Vikhrev
#12 Print Post
Posted on 11-07-2026 13:27
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 Eric, I have very limited skills in Musca, well may be that I'm wrong.
However, photo 5 has shining scutum and it seems to me that there are short and sparse hairs on the eyes.
Nikita Vikhrev attached the following image:


[54.19Kb]
Nikita Vikhrev - Zool Museum of Moscow University
 
eklans
#13 Print Post
Posted on 11-07-2026 15:49
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Location: Franconia, Germany
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 Nice understatement, Nikita, the limited skills! Wink who wrote "DIPTERA an Introduction to Flies"?

But kidding aside: yes, I see the shining scutum and the short and sparse hairs on the eyes.
And it is the same fly as #6, which is in the shade and shows bristles on scutum and the more shiny grey abdomen - similar to the fly from the Azores in GBIF.
Greetings, Eric
 
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