Meliscaeva auricollis var. maculicornis

Meliscaeva auricollis var. maculicornis

Observation - Meliscaeva auricollis var. maculicornis. Description: The wings are out of focus because the hoverfly is shivering them. I've seen it before but this one didn't stop. Is it to warm up flight muscles, or display?

The wings are out of focus because the hoverfly is shivering them. I've seen it before but this one didn't stop. Is it to warm up flight muscles, or display?