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Photos of insects and people from the 2022 BugGuide gathering in New Mexico, July 20-24

National Moth Week was July 23-31, 2022! See moth submissions.

Photos of insects and people from the Spring 2021 gathering in Louisiana, April 28-May 2

Photos of insects and people from the 2019 gathering in Louisiana, July 25-27

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Previous events


Species Nemoria darwiniata - Columbian Emerald - Hodges#7035

Emerald Moth - Nemoria darwiniata - male Nemoria darwiniata - female Darwin's Emerald - Nemoria darwiniata Columbian Emerald Moth - Nemoria darwiniata - female Columbian Emerald - Nemoria darwiniata - male Columbian Emerald - Nemoria darwiniata Arizona Moth - Nemoria darwiniata Nemoria darwiniata
Show images of: caterpillars · adults · both
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Hexapoda (Hexapods)
Class Insecta (Insects)
Order Lepidoptera (Butterflies and Moths)
Superfamily Geometroidea (Geometrid and Swallowtail Moths)
Family Geometridae (Geometrid Moths)
Subfamily Geometrinae (Emeralds)
Tribe Nemoriini
Genus Nemoria
Species darwiniata (Columbian Emerald - Hodges#7035)
Hodges Number
Other Common Names
Darwin's Emerald
Synonyms and other taxonomic changes
Nemoria darwiniata (Dyar, 1904)
Phylogenetic Sequence # 910615
wingspan 27-34 mm
Adult: forwing green with straight white PM line and fainter oblique AM line; veins faint, whitish; costa and fringe white; orange dot at apex; thorax green; abdomen light green or brown with white dorsal spots surrounded by reddish-brown ring
hindwing similar but PM line with slight bend in middle; tiny reddish or orange discal spot on all wings (a distinctive feature) Ferguson notes that the discal spots can vary from red to green.
Specimens identified by DNA analysis:

Larva: color extremely variable (white, yellow, pale brown, light green, silver, or dark brown); abdominal segments 2-5 with pointed lateral flanges; integument granulate, almost velvety
British Columbia to California, east to New Mexico, north to Alberta
mountain forests
adults fly from June to August
larvae from March to September
larvae feed on leaves and flowers of various trees and shrubs: oak (Quercus spp.), Myrica, Oceanspray (Holodiscus discolor), Black Hawthorn (Crataegus douglasii), manzanita (Arctostaphylos spp.), Antelope Bitterbrush (Purshia tridentata), Snowbrush (Ceanothus velutinus), Smooth Sumac (Rhus glabra), Scouler's Willow (Salix scouleriana)
Nemoria darwiniata darwiniata - (western & southwestern range)
Nemoria darwiniata punctularia Barnes & McDunnough, 1918 - (central & southern CA only) This sub-species has bolder discal spots and more intense reddish area surrounding the much reduced abdominal spots. (Maury J. Heiman)
See Also
Nemoria glaucomarginaria has larger white spots on the abdomen, surrounded by a very similar reddish color and no discal spots on the wings.

The only other Emerald moth with reddish discal spots is Nemoria zelotes, which has a prominent red terminal line on all wings, and is apparently restricted to Arizona.