---

Hello,

an 8-9 mm Muscidae at some fruits in our courtyard this afternoon (northwest Germany). At first I thought of the usual Phaonia tuguriorum, but on a closer look I am not sure anymore...

---

Pic #2

---

Pic #3

---

Pic #4

---

Pic #5

---

Hallo Jürgen, female Phaonia trimaculata, I think.

---

Hello Eric,



thank you again!

---

Sorry, one more question: could this one from today at a cut log at the forest border be the same species?

---

Hi Jürgen, very likely, the only thing that contradicts: Gregor et al state that the should appear IV to IX. But I've found them in XI, too...

---

Thanks again, Eric!

I think, most of the flies that overwinter as adults, become temporarily active on warm and sunny winter days. I found Neomiya cornicina, Scathophaga stercoraria and Calliphora vicina today, too (and even at the beginning of January, when it was 16 °C warm).

---

Here in Reading, UK I have foiund Phaonia trimaculata is actually most common in the winter months. The plot below is based on specimens I have collected since 2014 (all but 2 since 2018).

---

Thanks, tristram, nice work and very useful!

---

Thanks, Tristram!

That phenogram looks like one for the ubiquitous Phaonia tuguriorum, a species that can be seen all the year round here, but typically in the colder months (first sighting here on January 2nd).