Diptera.info :: Identification queries :: Diptera (adults)
 Are these Two Tachinids?
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| Stephen |
Posted on 11-07-2006 12:04
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 Member Location: West Virginia USA Posts: 1322 Joined: 12.04.05 |
I am trying to get better at at least identifying flies to family. Are these two flies Tachinidae? I'm going by overall appearance and the lots of bristles. Thanks for any help! Stephen attached the following image:  [100.26Kb] --Stephen Stephen Cresswell www.americaninsects.net |
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| Stephen |
Posted on 11-07-2006 12:09
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Member Location: West Virginia USA Posts: 1322 Joined: 12.04.05 |
Here's the second fly. Tachinid? Both were photographed in West Virginia, USA. Stephen attached the following image:  [90.37Kb] --Stephen Stephen Cresswell www.americaninsects.net |
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| Susan R Walter |
Posted on 11-07-2006 12:19
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 Member Location: Touraine du Sud, central France Posts: 1802 Joined: 14.01.06 |
Stephen The first one I think is going to be Pollenia sp, so Calliphoridae. See the short golden hairs on the side of the thorax? And the bend in the 4th vein is not a sharp change in angle, but a rounded corner. The second one certainly has the typical tachinid rear end coronet of bristles, but I expect Chris or Theo can take you forward with this one. Susan |
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| ChrisR |
Posted on 11-07-2006 14:06
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 Super Administrator Location: Reading, England Posts: 7706 Joined: 12.07.04 |
Hi Stephen (& Susan) I agree with Susan - the first is a callaphorid, with its irregular dusting on the abdomen and hairy thorax. If you compare the 2 pics the first fly is hairy but not exactly 'bristly'. Fly 2 is definitely a tachinid and it might be a Carcelia sp. but it's impossible to say for sure without a clearer lateral view, showing the bristles on the face. |
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| Stephen |
Posted on 11-07-2006 20:15
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Member Location: West Virginia USA Posts: 1322 Joined: 12.04.05 |
Susan, Chris, Thanks so much for the help. I am starting to categorize my photos and notes and I hope soon to be better at assigning family. Thanks so much for giving, not just the ID, but the several tips. I don't have much experience with things like wing venation, but what little I have done I have been pleasantly surprised at how clear the venation details are in most photographs. Thanks again! --Stephen Stephen Cresswell www.americaninsects.net |
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| Kahis |
Posted on 11-07-2006 20:37
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 Member Location: Helsinki, Finland Posts: 1999 Joined: 02.09.04 |
Your welcome. If you search the archive for 'Pollenia' you'll see that everyone sends pictures of these flies and labels them as 'Tachinidae?'. No wonder, they are large, common in gardens and fields, rather slow and thus relatively easy to shoot. Given the variability of the shape and hairiness, and often poor condition of overwintering adults I stilll occasionally mistake Pollenia for a tachinid in the field. Kahis |
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