Diptera.info :: Identification queries :: Diptera (adults)
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 Bat-nosed fly
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| Jan Zwaaneveld |
Posted on 03-05-2007 21:12
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Member Location: Leerdam, Netherlands Posts: 721 Joined: 20.02.06 |
Yesterday I found this one inside our house at Leerdam, Netherlands. It was a big fly (appr. 12-15 mm) and after I caught it to put it outside I managed to take some photos. I'm in doubt whether it is Sarcophagidae or perhaps a Sarcophagidae-looking Tachinid fly. The eyes were not as red as photo 1 suggests, and even less red than in photo 2 (I had to use flash). Most remarkable was that 'nose', it looked almost like a bat! Jan Zwaaneveld attached the following image:  [151.53Kb] http://slamenietd...web-log.nl |
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| Jan Zwaaneveld |
Posted on 03-05-2007 21:12
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Member Location: Leerdam, Netherlands Posts: 721 Joined: 20.02.06 |
photo 2
Jan Zwaaneveld attached the following image:  [131.04Kb] http://slamenietd...web-log.nl |
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| Susan R Walter |
Posted on 03-05-2007 21:21
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 Member Location: Touraine du Sud, central France Posts: 1802 Joined: 14.01.06 |
Jan It's a very newly emerged Sarcophagid. The 'bat-nose' is used for cutting/pushing it's way out of the pupal case. It will fall off pretty quickly. Susan |
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| Jan Zwaaneveld |
Posted on 03-05-2007 22:05
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Member Location: Leerdam, Netherlands Posts: 721 Joined: 20.02.06 |
Thanks Susan, very interesting! I did not know they use a removable nose to work their way out of the pupal case 
http://slamenietd...web-log.nl |
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| Tony Irwin |
Posted on 03-05-2007 22:27
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 Member Location: Norwich, England Posts: 7293 Joined: 19.11.04 |
Hi Jan- Susan is not strictly correct when she says the "nose" will fall off - it's actually retractable. All "higher" flies have an inflatable sac - the ptilinum. They fill it with fluid to create a hydraulic ram with which they can push open the puparium to emerge. After emergence, the sac deflates and is retracted into the head. The only sign it was there is the suture above the antennal bases and down the sides of the face - the ptilinal suture. This is true of all the acalyptrates and calyptrates (I think!).
Tony ---------- Tony Irwin |
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| Jan Zwaaneveld |
Posted on 04-05-2007 17:36
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Member Location: Leerdam, Netherlands Posts: 721 Joined: 20.02.06 |
Thank you for this very interesting addition, Tony!
http://slamenietd...web-log.nl |
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