Eristalis cerealis (灰带管蚜蝇).
Rainy weather provides a good opportunity for sorting out some old photos. I photographed this drone fly in early May but they are always around in warm weather and as generalist pollinators appear anywhere in Changsha there are flowering plants. Their water-born larva, called 'rat-railed maggots' have a long breathing appendage, mistakenly labelled a tail.
