St Marks Fly (Bibio marci) possibly

St Marks Fly (Bibio marci) possibly

Observation - St Marks Fly (Bibio marci) possibly - UK and Ireland. Description: Over 1cms, nearer 2 long. Observed resting on yellow flag iris leaf beside a long established fish

Over 1cms, nearer 2 long. Observed resting on yellow flag iris leaf beside a long established fish pond. Flew off unseen after 1st photo taken.