Genus Helophilus Marsh Fly
https://www.inaturalist.org/observations/213114896
Pollinating a Nestotus stenophyllus (Narrowleaf Goldenrod ) flower https://www.inaturalist.org/observations/212942873
Sagebrush habitat
Observed on roadside in loose, sandy soil. Flowers were observed to be repeatedly pollinated by a Gray Hairstreak (Strymon melinus). Three other plants observed in viscinity flowering and fruiting.
Pure sand roadcut. More kinds of flowers blooming now. View up the hillside.