Numbers
Lafontaine & Schmidt (2010) listed 52
Lithophane species in America north of Mexico.
(1)
3 species were described in 2006 by Jim Troubridge (see
PDF doc)
Identification
Adult: forewing usually gray to brownish with indistinct lines; live individuals at rest have an obvious and characteristic "square-shouldered" appearance
Larva: body usually green or grayish with variable pale or dark markings (
see live images of 25 species by Lafontaine
et al at CBIF)
Range
much of North America south of the arctic but most species are restricted to northern United States and southern Canada
Habitat
mixed and deciduous forests and woodlots; adults are nocturnal and come to light and bait
Season
adults fly in spring and fall
In Canada, these are winter moths; they emerge in September and October, fly for a month, then hibernate and fly again in March and April. Larvae feed in spring and summer, pupate, and emerge as moths in the fall. [Tony Thomas]
Food
larvae of most species feed on leaves of broadleaved trees and shrubs; a few species feed on conifers such as cedar (in L. thujae) and juniper (in L. boogeri); some larvae may also feed on other caterpillars, including their own siblings
They have been observed to feed on winter moth caterpillars and sawfly larvae (Sam Jaffe's observation,
here, also B. Moisset,
here)
Life Cycle
overwinters as an adult; one generation per year
Print References
Troubridge, J.T. 2006. Three new species of
Lithophane Hubner (Lepidoptera: Noctuidae: Xyleninae). Zootaxa 1284: 61-68. Magnolia Press. - available in
PDF formatInternet References
adult image thumbnails of 24 species occurring in eastern Canada (CBIF)
adult image thumbnails of 22 species occurring in western Canada (CBIF)
pinned adult images of 24 species by Jim Vargo (Moth Photographers Group)
live larva images of 25 species (Lafontaine
et al, CBIF)
distribution and foodplants; PDF doc of 11 species, plus seasonality and remarks (David Wagner
et al, Owlet Caterpillars of Eastern North America, U. of Connecticut)
distribution in Canada of 30 species, listing provinces of occurrence for each (U. of Alberta, using CBIF data)