Muscidae?

Muscidae?

Observation - Muscidae?. Description: Large fly seen running around on trunk of fallen willow at riverside. It seemed to be on the trunk for a reason rather than just sunning itself. Apologies for poor photos, I spooked it after a few grab shots.

Large fly seen running around on trunk of fallen willow at riverside. It seemed to be on the trunk for a reason rather than just sunning itself. Apologies for poor photos, I spooked it after a few grab shots.