Eupithecia nimbosa
(Hulst, 1896)
Pug moth
Eupithecia nimbosa is a small geometrid described by George Duryea Hulst in 1896. It occurs throughout the Rocky Mountains from Arizona to the Canada–US border. Like other members of its , it has narrow wings and a distinctive resting posture. The has been documented visiting apple flowers at night, contributing to pollination of fruit crops.
Pronunciation
How to pronounce Eupithecia nimbosa: /juːˈpɪθ.i.sɪə nɪmˈboʊ.sə/
These audio files are automatically generated. While they are not always 100% accurate, they are a good starting point.
Identification
Recognizable as a member of Eupithecia by narrow wings and characteristic resting posture with wings held flat or slightly folded. Definitive identification to level typically requires examination of genitalia or specialized reference materials, as many Eupithecia species are morphologically similar. The E. n. bindata occurs in Washington and California.
Appearance
Wingspan 21–22 mm. Typical of Eupithecia 'pug' : small size with narrow, relatively unmarked wings. Specific coloration and pattern details for this are not well documented in available sources.
Habitat
Rocky Mountain regions; associated with mixed conifer forest at moderate to high elevations. One observation site documented dry, mixed conifer forest with oaks at approximately 7,000 feet elevation.
Distribution
Widespread in the Rocky Mountains from Arizona northward to the Canada–US border. E. n. bindata restricted to Washington and California.
Behavior
; attracted to lights. Has been observed visiting apple flowers at night, indicating nectar-feeding and potential role in nocturnal pollination.
Ecological Role
Documented as a visitor to apple flowers, contributing to nighttime pollination of fruit crops. As a member of Geometridae, larvae (if typical of the ) would be foliage feeders, though specific larval for this is not recorded.
Human Relevance
Identified as one of several contributing to apple pollination in agricultural settings, demonstrating that moth species can provide valuable services even where related species may have pest status.
Similar Taxa
- Other Eupithecia speciesMany 'pug' in this share narrow wings and similar size; -level identification requires detailed examination
- Eupithecia nimbosa bindata distinguished by geographic occurrence in Washington and California versus nominate subspecies in Rocky Mountain interior
More Details
Subspecies
Eupithecia nimbosa nimbosa (nominate , Rocky Mountains); Eupithecia nimbosa bindata Pearsall, 1910 (Washington, California)
Pollination research
Photographed on apple flower during University of Arkansas study on in apple orchards (Robertson et al., 2021, Journal of Economic Entomology), demonstrating active participation in crop pollination