The Erynnis funneralis has physical attributes such as narrow and pointed forewings with relatively triangular hindwings. While the upper-side of the wing is black, the forewing has a dull brown patch at the end of the cell. In addition, the hindwing has a white fringe on the outer margin. In respect to dimorphic characteristics, males have costal folds containing yellow scent scales. In contrast, females have patches of scent scales on the 7th abdominal segment. For both sexes, the wing-span ranges from 3.4cm-4.5cm. While the general habitat of the funereal duskywing includes deserts arid lowlands, and roadsides, the geographic distribution of this species ranges from southern California to Argentina. Other locations that the Erynnis funneralis can be found includes Arizona, New Mexico, northeast Nebraska, and central Colorado. While the adult butterflies utilize flower nectar as a food source, caterpillars feed on their host plants which include bur clover, deerweed, desert ironwood, and vetch (1).
(1) “Funereal Duskywing Erynnis funeralis (Scudder & Burgess, 1870), Butterflies and Moths of North America, Metalmark Web and Data, https://www.butterfliesandmoths.org/species/Erynnis-funeralis.
Photograph: Marily Woodhouse @ Battle Creek Alliance