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| 1 | 2 |  » Stats |
Members: 50,153
Threads: 82,340
Posts: 853,210
Top Poster: glsammy (15,069)
| | Welcome to our newest member, Xalrahc | |  | 
12-07-2009, 09:28 PM
|  | Active Member | | Join Date: Apr 2009
Posts: 64
| | | Un Known Flashing Fly
I spotted these today after a nights rain, I thought at first it was a glow fly, you can see them one second then they vanish, I was very lucky that as I was taking a shot of one on a log, one flashed in shot and you can see the white streak as it flys by. Anyone know what they are.  |
13-07-2009, 06:09 AM
| | Wild Member | | Join Date: Jun 2009
Posts: 196
| | | Re: Un Known Flashing Fly
Argyra sp. - dolichopodidae. |
13-07-2009, 09:54 AM
|  | Knight Grand Cross of the Wild Empire | | Join Date: Jul 2007 Location: London
Posts: 11,830
| | | Re: Un Known Flashing Fly
Interesting, Lync. So doli's can produce light sources like glow-worms? Thanks for sharing, Thistledo! |
13-07-2009, 12:22 PM
| | Wild Member | | Join Date: Jun 2009
Posts: 196
| | | Re: Un Known Flashing Fly
Quote:
Originally Posted by Jason Green  Interesting, Lync. So doli's can produce light sources like glow-worms? Thanks for sharing, Thistledo! |
No, not really; it's just a 'shimmer' effect as the light reflects off the
abdomen. Why it is so pronounced with these flies I'm not sure. |
13-07-2009, 12:36 PM
| | Knight Grand Cross of the Wild Empire | | Join Date: Jul 2007 Location: London
Posts: 11,830
| | | Re: Un Known Flashing Fly
Ah, it's been a long week... 
Is this shimmering more notable in Argyra's than other Dolis, or a general effect of the metallic colours that they all share? |
13-07-2009, 07:42 PM
| | Wild Member | | Join Date: Jun 2009
Posts: 196
| | | Re: Un Known Flashing Fly
Quote:
Originally Posted by Jason Green Ah, it's been a long week...
Is this shimmering more notable in Argyra's than other Dolis, or a general effect of the metallic colours that they all share? | I don't know of any other flies where this effect is so pronounced, but a range of flies show 'shimmer stripes' or similar effects that are visible under the microscope and can be useful in identification. |
14-07-2009, 07:36 AM
| | Active Member | | Join Date: Apr 2009
Posts: 64
| | | Re: Un Known Flashing Fly
Thanks for all your help everyone, its most appreciated.
Bob | | |
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