Not sure - Hoverfly?

Not sure - Hoverfly?

Observation - Not sure - Hoverfly?. Description: The behaviour first caught my attention - several of them were around, and all were doing a side-to-side wiggle as they worked their way along the reed leaves.

The behaviour first caught my attention - several of them were around, and all were doing a side-to-side wiggle as they worked their way along the reed leaves.