Identification, Images, & Information
For Insects, Spiders & Their Kin
For the United States & Canada

Species Xanthorhoe ferrugata - Red Twin-Spot - Hodges#7388

Geometridae: Xanthorhoe ferrugata? - Xanthorhoe ferrugata Caterpillar - Xanthorhoe ferrugata Xanthorhoe ferrugata Euphyia intermediata ? - Xanthorhoe ferrugata Xanthorhoe ferrugata (Red Twin-Spot) - Xanthorhoe ferrugata Xanthorhoe ferrugata 7388  - Xanthorhoe ferrugata Xanthorhoe ferrugata - male diurnal moth - Xanthorhoe ferrugata - male
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 Larentiinae
Tribe Xanthorhoini
Genus Xanthorhoe
Species ferrugata (Red Twin-Spot - Hodges#7388)
Hodges Number
Other Common Names
In Europe, this species is called Dark-barred Twin-Spot, and a different species (X. spadicearia) is called Red Twin-Spot. How's that for confusion?
Synonyms and other taxonomic changes
Author: (Clerck, 1759)
wingspan 18-25 mm
Adult: forewing with wide dark reddish-brown or black median area, and double blackish spot in subterminal area below apical patch; basal area usually reddish-brown; apical patch usually brownish and diffuse; double blackish spot in subterminal areas is distinguishing feature

holarctic; in North America ranges from Alaska to Newfoundland, south in the east to northern Georgia, south in the west to California
suburban lawns and gardens
adults fly from April/May to September
North American larvae feed on chickweed (Stellaria spp.), ground-ivy or gill-over-the-ground (Glechoma hederacea), and smartweed (Polygonum spp.)
Life Cycle
at least two generations per year
The larval food plants are commonly found in lawns that haven't been treated with weed-killer.
Internet References
live adult images plus description, larval foodplants, flight season (Lynn Scott, Ontario)
live adult image (Ian Kimber, UK Moths)
live adult image (Jens Christian Schou, Denmark)
live larva image (Kimmo Silvonen, Finland)
pinned adult images showing variation in color between specimens (CBIF)
pinned adult image (James Adams, Dalton State College, Georgia)
common name reference plus larval food plants and flight season (Ohio State U.)
presence in Georgia [search on species "ferrugata"] specimen recorded in Towns County in July 2006 by James Adams and Irving Finkelstein (Lepidopterists Society Season Summary, U. of Florida)
distribution in Canada list of provinces and territories (CBIF)
world distribution map plus live and pinned adult images, foodplants, European common name reference (Markku Savela, FUNET)