This insect flew through my open 10th floor window, around midnight.
Its flying pretty fast for insects, and bumping into the ceiling a lot.
Location: southern Germany.
For me it looks almost like a hornet, except for the eyes, which in my opinion are way to big for hornets.
The wire mesh in the background has a 12mm spacing.
Any guesses?
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1 Answer
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Not a hornet at all, nor any Hymenoptera but rather a Diptera. As you suggest, the eyes as well as the wing structure give it away.
It looks like a horse fly, possibly Tabanus sudeticus or Tabanus bovinus based on the large size and coloration in the abdomen.
answered Jul 6, 2021 at 23:40