Posted by Karsten Thomsen on 16-10-2024 11:25
#1
Which
Sphegina male? Hvideodde, Bornholm, Denmark, 26 June 2024. The face appears black, and the wing tips darkened. Also, the costa and subcosta seem to join before croossvein r-m. I therefore speculate towards
S. nigra (syn.
clavata), a species seemingly not registered that far north before.
Edited by Karsten Thomsen on 05-11-2024 18:01
Posted by Karsten Thomsen on 05-11-2024 18:01
#4
We have after much consideration now agreed to include this observation af
Sphegina nigra as a new species record for Denmark, https://www.naturbasen.dk/observation/4902959/sort-barksvirreflue
One decisive character is the infuscated wing tips.