Signalling fly

Signalling fly

Observation - Signalling fly. Description: These flies come to my pond every year and spend their days on the lily pads. They act like they're sending signals to each other with their wings, quickly opening and closing them as if displaying to each other.

These flies come to my pond every year and spend their days on the lily pads. They act like they're sending signals to each other with their wings, quickly opening and closing them as if displaying to each other.