Other Common Names
called Common Carpet in Europe
Range
holarctic: occurs throughout Eurasia; in North America, ranges across the northern US, plus every province and territory of Canada
Habitat
meadows or grassy areas bordering woodlands
Food
larvae feed on bedstraw (Galium spp.) (
UK Moths)
Remarks
Lots of photos from Eurasia on the web, but little biological info and few photos from North America (surprising for such an apparently widespread species).
See Also
Sharp-angled Carpet (
Euphyia intermediata) forewing subterminal area is drab or "washed out", and hindwing lacks gray and white banding.
Compare images of both species at CBIF.
Toothed Brown Carpet (
Xanthorhoe lacustrata) is also similar; see comments here

Internet References
live adult image (Steve Walter, Connecticut)
live adult image (Mike Pingleton, Pennsylvania)
live adult image (Markku Savela, Russia)
live adult image (Kimmo Silvonen, Finland)
live adult image (Butterflies & Moths in the Netherlands)
common name reference (Ontario Ministry of Natural Resources)