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Species Thallophaga taylorata - Hodges#6808

Thallophaga taylorata 554 Thallophaga  taylorata - Taylor's Thallophaga Moth 6808 - Thallophaga taylorata orange caterpillar on sword fern - Thallophaga taylorata 2060 Thallophaga taylorata - Taylor's Thallophaga Moth 6808 - Thallophaga taylorata Cool Geometrid - Thallophaga taylorata Thallophaga taylorata Thallophaga taylorata Thallophaga taylorata  - Thallophaga taylorata
Show images of: caterpillars · adults · both
Classification
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 Ennominae
Tribe Lithinini
Genus Thallophaga
Species taylorata (Thallophaga taylorata - Hodges#6808)
Hodges Number
6808
Numbers
one of three species in this genus in North America listed at All-Leps
Size
wingspan 31-34 mm, based on photos of Internet specimens
Identification
Adult: forewing light to medium brown or grayish-brown with dark speckling, pale veins, straight dark median line that fades before reaching costa, and pointed apex with slightly falcate outer margin; PM line with black dots at veins; slightly darker shading beyond PM line, blending into short apical dash

Larva: body orange, brown, and tan with faint white subdorsal longitudinal lines; midabdominal intersegmental areas orange brown
[description by Jeff Miller]
Range
California to British Columbia
Habitat
wet western coniferous forests
Season
adults fly in early spring
larvae in May and June
Food
larvae feed on fronds of ferns, particularly Western Swordfern (Polystichum munitum)
Life Cycle
overwinters as a pupa buried in soil; adults emerge in early spring; larvae present in May and June; one generation per year
See Also
Thallophaga hyperborea forewing has a slightly wavy median line that reaches the costa, its outer margin is not falcate near the apex, and its hindwing lacks a dark median line (compare images of both species at CBIF)
Internet References
pinned adult images of two specimens (CBIF)
pinned adult image plus description, habitat, flight season, foodplant (Jeff Miller, Macromoths of Northwest Forests and Woodlands, USGS)
live larva image plus description, foodplant, seasonality (Jeffrey Miller, Caterpillars of Pacific Northwest Forests and Woodlands, USGS)
presence in California; list (U. of California at Berkeley)