Compact dipteran, iridescent but appearing grayish at a distance in the field, active, perching on the surface tension of pond in an area of shallow water with a muddy/cobbly substrate and very little aquatic vegetation. Collected. Active flier, making short, low flights and then landing again on the water surface (foraging?). At least 25 seen. Pond constructed from old, incised stream channel in spring 2021 during stream restoration work. Sunny morning, 37 F to 47 F, sunny, calm wind varying to gentle breeze, no snow cover, no ice on ponds. The week before was unseasonably warm, with highs at times in the mid-60s.

Elevation ca 4000 feet. Disturbed riparian corridor on stream restoration site within a patchwork of native and non-native grassland.

Apices of antennae apparently broke off before I got the specimen pinned but are present in field photos.