St Mark's Fly (Bibio marci)

St Mark's Fly (Bibio marci)

Observation - St Mark's Fly (Bibio marci) - UK and Ireland. Description: Cycled through swarms of these the other day. This specimen fell out of my helmet when I went to put

Cycled through swarms of these the other day. This specimen fell out of my helmet when I went to put it on again!