Not a bird dropping

Not a bird dropping

Observation - Not a bird dropping - UK and Ireland. Description: Trying yet again to catch a Holly Blue's underwings as they flit through our garden, I almost failed to notice that this wasn't a bird dropping at all. Has the look of a Carrion Beetle to me, but have no real idea.

Trying yet again to catch a Holly Blue's underwings as they flit through our garden, I almost failed to notice that this wasn't a bird dropping at all.
Has the look of a Carrion Beetle to me, but have no real idea.