Diptera.info :: Identification queries :: Diptera (adults)
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 Pollenia spec.? <=
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| BeJoCo |
Posted on 24-02-2026 18:32
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 Member Location: Posts: 88 Joined: 27.12.24 |
Hello everyone! Is my identification of the genus correct? If so, could it be Pollenia vagabunda? Size: < 10 mm Date found: February 24, 2024 Habitat: on the garden-facing wall of the house, in full sun Location: in a village, Nuremberg region, 340 m above sea level BeJoCo attached the following image:  [152.59Kb] Edited by BeJoCo on 25-02-2026 19:53 Best regards Bernd |
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| BeJoCo |
Posted on 24-02-2026 18:33
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Member Location: Posts: 88 Joined: 27.12.24 |
a 2. picture
BeJoCo attached the following image:  [128.5Kb] Best regards Bernd |
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| eklans |
Posted on 25-02-2026 09:27
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Member Location: Franconia, Germany Posts: 4513 Joined: 11.11.18 |
Female Pollenia is correct, but P. vagabunda has a dark basicosta - your fly's bc is pale. It seems, that it has only 1 ad on mid tibia - could be a P. angustigena (overwinters a an adult), but not enough details to be sure. Olga Sivell (2021): Blow flies Greetings, Eric |
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| BeJoCo |
Posted on 25-02-2026 13:03
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Member Location: Posts: 88 Joined: 27.12.24 |
Hello Eric, thank you for answer. I'd like to ask for your help, as I'm a layperson. You mentioned the basicosta. In diagrams, I only ever find the terms Costa and Subcosta. The image below is a section of another photo of the same animal. Here, I've marked the Costa in red and the Subcosta in yellow (as I understand it). Is that correct, and where is the basicosta? BeJoCo attached the following image:  [129.98Kb] Best regards Bernd |
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| BeJoCo |
Posted on 25-02-2026 13:05
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Member Location: Posts: 88 Joined: 27.12.24 |
Here the tibia of the same animal.
BeJoCo attached the following image:  [77.11Kb] Best regards Bernd |
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| Jan Willem |
Posted on 25-02-2026 13:50
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 Member Location: Waalwijk, The Netherlands Posts: 2169 Joined: 24.07.04 |
You can find an overview of the wingvenation in for example: https://www.dipte...132016.pdf
Jan Willem van Zuijlen |
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| eklans |
Posted on 25-02-2026 13:59
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Member Location: Franconia, Germany Posts: 4513 Joined: 11.11.18 |
Hello Bernd, I've enhanced the brightness of your first image to show you the basicosta (bc), a small sclerite at the base of the costa - small but important for indentifying flies. This paper could be a big help in learning to identify brachycera: Tschorsnig, Herting (1994): Raupenfliegen Mitteleuropas It's available under https://www.biodi...e/33533805, in German and contains a definition of the terms and many drawings! eklans attached the following image:  [29Kb] Greetings, Eric |
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| eklans |
Posted on 25-02-2026 14:01
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Member Location: Franconia, Germany Posts: 4513 Joined: 11.11.18 |
Gold medal for Jan Willem 
Greetings, Eric |
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| BeJoCo |
Posted on 25-02-2026 19:50
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Member Location: Posts: 88 Joined: 27.12.24 |
Hello Jan Willem, hello Eric! Thank you so much for your efforts and the links, and for Eric's explanation using my own example. I had to take a closer look at all of that. That's a lot of information. A lot to take in for an old man. 
Best regards Bernd |
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