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Diptera.info :: Identification queries :: Diptera (adults)
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Pollenia alive without head
jean-claude bernard
#1 Print Post
Posted on 25-02-2008 14:00
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Location: near Brest (France)
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hello,
yesterday, I have found this Pollenia alive without head. this fly doesn't fly, but walk and jump.
today, she is always alive. I catch it and put it in a box.
what do you think about this incredible thing ?
jean-claude
24 02 2008
near brest (france)
6mm (without head !)
jean-claude bernard attached the following image:


[103.58Kb]
Edited by jean-claude bernard on 25-02-2008 14:03
 
jean-claude bernard
#2 Print Post
Posted on 25-02-2008 14:01
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Location: near Brest (France)
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second pic
front view
jean-claude bernard attached the following image:


[107.66Kb]
 
crex
#3 Print Post
Posted on 25-02-2008 14:46
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It's a cruel world ... Frown
 
jorgemotalmeida
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Posted on 25-02-2008 14:53
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if anyone believes in reincarnation (in another animals) this fly can be the decapitated Louis XVI. Grin
 
http://www.flickr.com/photos/superegnum
Andre
#5 Print Post
Posted on 25-02-2008 15:48
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We don't have a category for that, do we Paul? Shock Grin

PS: it's a male.... typical?.... Cool
Edited by Andre on 25-02-2008 15:55
 
www.biomongol.org
Andre
#6 Print Post
Posted on 25-02-2008 15:52
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Once I tried to catch a very fast flying dragonfly (Odonata) with my dipteranet. After several futile attempts, suddenly I got it after a good and firm swing.
Looking inside my net I found the poor creature, decapitated! It seemed dead. Sad
I took it in my hand and after a few seconds... it suddenly tried to fly away... Shock
It scared the hell out of me! Grin

I never found the head to mend this broken heart. Sad
 
www.biomongol.org
jean-claude bernard
#7 Print Post
Posted on 25-02-2008 18:18
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Location: near Brest (France)
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I have a reponse from a french entomologist professor. the head is hiding in the thorax. he can see the flat eyes and the palp.
conclusion : malformation.
jean-claude
Edited by jean-claude bernard on 25-02-2008 18:19
 
Tony Irwin
#8 Print Post
Posted on 25-02-2008 22:19
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jean-claude bernard wrote:
I have a reponse from a french entomologist professor. the head is hiding in the thorax. he can see the flat eyes and the palp.
conclusion : malformation.
jean-claude

In that case, I'm very puzzled as to how the fly managed to emerge from its puparium! All the "higher" flies make use of the ptilinum which they inflate to push off the end of the puparium. Without it, the fly would be trapped and unable to escape. I don't believe this fly can have had an effective ptilinum without a fully formed head.
I suggest that all Pollenia look like this when their head is removed. (Have just decapitated a dead Calliphora - looks very similar.)
Tony
----------
Tony Irwin
 
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