Beegfly on Flower of Weedy Hawksbeard (Crepis vesicaria ssp. taraxacifolia), Again
In this image and the next, you can see the halteres. These tiny white knobs help the fly maintain balance and maneuverability in flight. They evolved from the insect's second pair of wings. Thanks, Pierre Martineau! Trail 15, 10:34:11 am.