Diptera.info :: Identification queries :: Diptera (adults)
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 Calliphoridae? - ZV3 - 02/04/2011
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| Jeroen K |
Posted on 01-06-2011 17:22
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Member Location: Kapellen, Belgium Posts: 1141 Joined: 03.04.09 |
02/04/2011, Bos van Aa (ZV3), Belgium. Bycatch from a pitfall trap. ID'able? Thanks in advance!
Jeroen K attached the following image:  [56.69Kb] |
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| Jeroen K |
Posted on 01-06-2011 17:22
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Member Location: Kapellen, Belgium Posts: 1141 Joined: 03.04.09 |
Picture 2:
Jeroen K attached the following image:  [53.43Kb] |
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| ChrisR |
Posted on 01-06-2011 18:10
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 Super Administrator Location: Reading, England Posts: 7706 Joined: 12.07.04 |
It looks wet, which covers up a lot of features, such as dusting, bristles and colour ... I would pin & dry it then take more photos.
Manager of the UK Species Inventory in the Angela Marmont Centre for UK Biodiversity at the Natural History Museum, London. |
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| Jeroen K |
Posted on 01-06-2011 18:16
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Member Location: Kapellen, Belgium Posts: 1141 Joined: 03.04.09 |
Thanks for the advice. I'll dry it, but I don't have the material to pin it. |
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| ChrisR |
Posted on 01-06-2011 18:23
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Super Administrator Location: Reading, England Posts: 7706 Joined: 12.07.04 |
Pitfall bycatches are notoriously difficult to work with because the specimens are usually in very poor condition. I would soak & wash the specimens in alcohol first to remove any dirt and other chemicals and then dry them carefully to reveal the surface features ... but it might still be a bit of a long-shot 
Manager of the UK Species Inventory in the Angela Marmont Centre for UK Biodiversity at the Natural History Museum, London. |
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| Jeroen K |
Posted on 01-06-2011 18:29
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Member Location: Kapellen, Belgium Posts: 1141 Joined: 03.04.09 |
The pitfall traps are for a spider inventarisation project. 25 traps, emptied every 2 weeks during a year. I get all Diptera bycatch... I think 'long-shot' is exactly the right word  |
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| ChrisR |
Posted on 01-06-2011 18:40
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Super Administrator Location: Reading, England Posts: 7706 Joined: 12.07.04 |
What sort of chemicals are in the pit-fall liquid? Are they using ethylene-glycol? I tried it once in a malaise trap ... never again. 
Manager of the UK Species Inventory in the Angela Marmont Centre for UK Biodiversity at the Natural History Museum, London. |
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| Jeroen K |
Posted on 01-06-2011 18:47
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Member Location: Kapellen, Belgium Posts: 1141 Joined: 03.04.09 |
I'm pretty sure they use formaldehyde. Afterwards, the specimens are cleaned and conserved in 70 % ethanol. |
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| ChrisR |
Posted on 01-06-2011 19:44
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Super Administrator Location: Reading, England Posts: 7706 Joined: 12.07.04 |
Ahh, not too bad then ... one of those specimens looked like it had some salts/residue on it so I wondered whether they were using something that left behind a mess.
Manager of the UK Species Inventory in the Angela Marmont Centre for UK Biodiversity at the Natural History Museum, London. |
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