Catocala obscura

Strecker, 1873

Obscure Underwing

Catocala obscura, the obscure underwing, is a in the Erebidae. It is found in eastern North America from southern Canada to the southeastern and midwestern United States. are active from July to October, with a wingspan of 60–72 mm. The is named for its relatively subdued hindwing pattern compared to other underwing moths.

Catocala obscura 49372124 by Peter Waycik. Used under a CC0 license.

Catocala obscura by Doctorkilmer. Used under a Public domain license.

- 8784 – Catocala obscura – Obscure Underwing Moth by Wildreturn. Used under a CC BY 2.0 license.

Pronunciation

How to pronounce Catocala obscura: /ˌkætəˈkeɪlə ɑbˈskjʊrə/

These audio files are automatically generated. While they are not always 100% accurate, they are a good starting point.

Identification

The obscure underwing can be distinguished from similar Catocala by its relatively dull, less contrasting hindwing pattern. The hindwings lack the bright orange, red, or yellow bands seen in many such as C. ilia or C. concumbens. The forewing pattern is similarly subdued, with less distinct and spots than many related species. Examination of genitalia may be required for definitive identification where ranges overlap with similar species.

Images

Appearance

Wingspan 60–72 mm. Forewings are cryptically colored in muted gray-brown tones, providing camouflage against tree bark when at rest. Hindwings are typically less vividly patterned than many , with subdued banding in shades of gray, black, and dull orange or pink. The relatively 'obscure' or dull hindwing coloration distinguishes this from more brightly marked underwings. Body is robust and furry, typical of the .

Habitat

Deciduous and mixed forests, particularly areas with hickory and walnut trees. Associated with mature woodland in the eastern United States and southern Canada.

Distribution

Eastern North America. In Canada: southern Quebec (rare) and Ontario. In the United States: from Massachusetts and Connecticut south to North Carolina, west to Mississippi, and north to Iowa, Illinois, Ohio, and Michigan.

Seasonality

are on wing from July to October, with exact timing varying by location within the range.

Diet

Larvae feed on Carya glabra (pignut hickory), Carya illinoinensis (pecan), Carya ovata (shagbark hickory), and Juglans nigra (black walnut). feeding habits are not well documented.

Host Associations

Carya glabra - larval pignut hickory
Carya illinoinensis - larval pecan
Carya ovata - larval shagbark hickory
Juglans nigra - larval black walnut

Life Cycle

Complete with , larva, pupa, and stages. Larvae feed on hickory and walnut foliage. likely occurs in soil or leaf litter. Adults emerge in mid to late summer and are active through autumn.

Behavior

are and attracted to light, though underwing moths typically remain on the periphery of light stations rather than landing directly on sheets. When at rest, forewings are held together over the back, concealing the hindwings. If disturbed, adults may flash their hindwings as a startle defense before taking .

Ecological Role

Larvae function as herbivores on hickory and walnut trees, contributing to nutrient cycling and serving as prey for and . may serve as prey for bats and birds, and potentially as for night-blooming flowers, though this has not been specifically documented for this .

Human Relevance

No significant direct economic impact. The is of interest to lepidopterists and naturalists. Like other underwing moths, it contributes to biodiversity documentation and citizen science efforts such as National Week.

Similar Taxa

Catocala iliaSimilar size and range, but has brighter orange and black hindwing bands
Catocala concumbensOverlapping range, but displays more vivid red or pink hindwing coloration
Catocala aholibahLarge underwing with more contrasting hindwing pattern
Catocala amestrisSimilar preferences but with more distinct hindwing markings

More Details

Taxonomic Note

The Catocala, commonly known as underwing moths, is part of the Erebidae. These were formerly placed in family Noctuidae. The name Catocala is derived from Greek meaning 'beautiful below', referring to the colorful hindwings concealed beneath cryptic forewings.

Conservation Status

Considered rare in southern Quebec, but not formally listed as threatened or endangered elsewhere in its range.