Diptera.info

Posted by Juergen Peters on 23-03-2023 21:13

Hello,

if I see it correctly, this male has dark basicostae (?). Maybe Calliphora loewi? Today at fruit bait in our courtyard (northwest Germany).

Edited by Juergen Peters on 23-03-2023 21:13

Posted by Zeegers on 24-03-2023 08:16

Yes, clear candidate C. loewi. Nice work.

Theo

Posted by Johane on 24-03-2023 13:18

Shouldn't the thorax be more striped in C. loewi and the frons narrower? :)
https://www.flick...885163532/

Posted by eklans on 24-03-2023 17:50

What about C. uralensis?
differs from loewi especially by:
- gena without a shining white spot
- no dark stripe between the pre acr

Posted by Juergen Peters on 24-03-2023 19:01

Hello,

interesting discussion. Thanks to all! I should have tried to get better photos. I took some additional today, but most showed clearly C. vicina. Only one male seemed to have dark basicostae. But unfortunately the pics are not better than those yesterday... :|

Posted by eklans on 24-03-2023 19:42

Hallo Jürgen, I forgot to list the frons which is an important character and Johan pointed to that.
Key in "Blowflies..." by Knut Rognes:
loewi: frons narrower than distance between posterior ocelli
uralensis: frons 1.5 times distance between posterior ocelli includive

And IMHO your last photo shows this.

Posted by Zeegers on 24-03-2023 20:08

#10

I am very uncomfortable telling uralensis from loewi apart from pictures, that is why I used ‘candidate’. You might be right, but zi don’t / didn’t expect uralensis at Juergen’s.
But then again, I also didn’t expect rohdendorfi in Poland …
Dark vittae on thorax should be considered from behind.

So, you might be right. I would like to be dead sure.

Theo

Posted by Juergen Peters on 24-03-2023 20:50

#11

Hello,

I add three pics from today. But I fear, the are not better.

Posted by Juergen Peters on 24-03-2023 20:51

#12

And one (big! 1600x1600 pixels) from another specimen of which I am not sure, if it is the same species.

Posted by eklans on 25-03-2023 09:00

#13

Hi Jürgen, I'm quite sure, that your last photo shows a male C. vicina: Tergit 3 has a shifting pattern and basicosta doesn't seem to be black (vicina: "basicosta pale, can be infuscated, brown but not entirely black", O. Sivell). To be "dead sure" you should try to make clear lateral shots, showing anterior spiracle, gena etc.

Posted by Zeegers on 25-03-2023 16:27

#14

To be dead sure, I’d like to see genitalia

Theo

Posted by Juergen Peters on 25-03-2023 19:38

#15

eklans wrote:
To be "dead sure" you should try to make clear lateral shots, showing anterior spiracle, gena etc.

Thanks! I will try, when the weather gets better (permanently raining today...) and the flies still come to my baits. But I'm afraid, I will not be able to provide (microscope) photos of the genitalia, as I am photographing live animals only...