Synonyms and other taxonomic changes
Cycnia tenera Hübner, 1818
Phylogenetic sequence # 930404
species occur in America north of Mexico.(1)
Forewing length 18-19 mm. (2)
Conspicuous yellow border on leading edge of forewing, goes most of the way to apex. In the similar Unexpected Cycnia, C. collaris, the yellow does not extend as far. Top of head and anterior portion of thorax yellow; dorsal surface of abdomen pale yellow or whitish, with large black spot on each segment.
Meadows, roadsides, with hostplant, sometimes day-flying.
Adults have at least two flights from May to October. (2)
Moth Photographers Group and Bug Guide add April records.
Larvae feed on
Milkweed (Asclepias spp.)
1: eggs. 2 and 3: caterpillars. 4: female laying eggs. 5: male
Male produces clicks during mating, and also, to jam bat echolocation. (3)
In Cycnia collaris, darker and the yellow on the forewing is restricted to the basal half of the costa.
C. oregonensis, also found in eastern North America, has no yellow along the forewing costa or on the thorax, and its abdomen is a darker orangish-yellow.
Covell, C.V. 1984. Peterson Field Guides: Eastern Moths. p. 74, pl. 13, fig. 6.(4)
Powell, J.A., and P.A. Opler 2009. Moths of Western North America. pl. 48.6; p. 271.(2)