Fly

Fly

Observation - Fly - UK and Ireland. Description: I walked through a few swarms of these today - any idea what they are? I've been walking in the same area for years and don't ever recall seeing these. I think I've put in the right group (invertebrates)

I walked through a few swarms of these today - any idea what they are? I've been walking in the same area for years and don't ever recall seeing these. I think I've put in the right group (invertebrates)