Geometer Moths and their Inchworms of Columbia County, Oregon

Geometer Moths, Superfamily Geometroidea, also known as “inchworms”, are one of several groups of moths of the order Lepidoptera. There are about 700 species within the Geometroidea superfamily, including over 200 species in our area of which we’ve only displayed the most common. A fantastic resource for more specific information on all our moths is Pacific Northwest Moths.

Other Lepidoptera groups include Tiger and Tussock Moths, Sphinx and Silk Moths, Cutworms and Dart Moths, Snout Moths and other Micromoths, Clearwing Moths, Plume Moths, Scoopwing Moths and Butterflies.

Geometer Moths (Geometridae)

Looper Moths and related Inchworms (subfamily Ennominae)

Geometer moths get their name from the way their larvae, or “inchworms”, appear to measure out distance as they crawl along. The “looper moth” name comes from the loop-like appearance of those same larva.

Omnivorous Looper Sabulodes aegrotata columbia county northwest oregon
Omnivorous Looper (Sabulodes aegrotata) Found in coastal forest. (photo © Jim Johnson)
Hemlock Looper Lambdina fiscellaria moth coumbia county northwest oregon
Hemlock Looper (Lambdina fiscellaria) – Feeds on the needles of conifers. (photo © Teá Montagna)
Yellow-dusted Cream Moth Cabera erythemaria columbia county northwest oregon
Yellow-dusted Cream Moth (Cabera erythemaria) – (photo © Mike Patterson)
Pale Beauty Campaea perlata moth columbia county northwest oregon
Pale Beauty (Campaea perlata) – (photo © Mike Patterson)

Omnivorous Looper larva Sabulodes aegrotata caterpillar inchworm northwest oregon columbia county
Omnivorous Looper larva (Sabulodes aegrotata) -Feeds on numerous plants and trees. (photo © Chris Mallory)
Hemlock Looper Lambdina fiscellaria columbia county northwest oregon
Hemlock Looper larva (Lambdina fiscellaria) – (photo © parasitis_voracibus)
Yellow-dusted Cream Moth Cabera erythemaria
Yellow-dusted Cream Moth (Cabera erythemaria) – (photo © christine123)
Pale Beauty larva Campaea perlata columbia county northwest oregon
Pale Beauty larva (Campaea perlata) – (photo © Rand Workman)

Western Carpet Melanolophia imitata moth columbia county northwest oregon
Western Carpet Moth (Melanolophia imitata) – (photo © pumakit)
Small Engrailed Ectropis crepuscularia moth columbia county northwest oregon
Small Engrailed (Ectropis crepuscularia) – (photo © Jim Johnson)
Emasculate Gray Moth Iridopsis emasculatum columbia county northwest oregon
Emasculate Gray Moth (Iridopsis emasculatum) – 1.7″-2.2″. (photo © Jim Johnson)

brown-lined looper Cercyonis pegala ariane columbia county northwest oregon
Brown-lined Looper (Cercyonis pegala ariane) – (photo © Jim Johnson)

Peppered Moth (Biston betularia) – (photo © Jim Johnson)
Common Gray Anavitrinella pampinaria moth
Common Gray (Anavitrinella pampinaria) – (photo © Royal Tyler)
Phantom Hemlock Looper Nepytia phantasmaria columbia county northwest oregon
Phantom Hemlock Looper (Nepytia phantasmaria) – (photo © cindyloou)
Vancouver Looper Erannis vancouverensis
Vancouver Looper (Erannis vancouverensis) – (photo © Jim Johnson)

Peppered Moth Biston betularia larva cater
Peppered Moth (Biston betularia) – (photo © Eric Knopf)
Common Gray larva Anavitrinella pampinaria moth columbia county northwest oregon
Common Gray larva (Anavitrinella pampinaria) – (photo © Joe Girgente)
Phantom Hemlock Looper larva Nepytia phantasmaria caterpillar columbia county northwest oregon
Phantom Hemlock Looper larva (Nepytia phantasmaria) – (photo © citizen1)
Vancouver Looper Erannis vancouverensis larva moth columbia county northwest oregon
Vancouver Looper (Erannis vancouverensis) – (photo © Bob Carter)

Pale-marked Angle Macaria signaria moth columbia county northwest oregon
Pale-marked Angle (Macaria signaria) – (photo © Jim Johnson)
Packard's Girdle Moth Sabulodes packardata columbia county northwest oregon
Packard’s Girdle Moth (Sabulodes packardata) – Feeds on the needles of conifers. (photo © Jim Johnson)
Morrison's Pero Moth Pero morrisonaria columbia county northwest oregon
Morrison’s Pero Moth (Pero morrisonaria) – (photo © Josh Vandermeulen)
Rindge's Pero Moth Pero mizon columbia county northwest oregon
Rindge’s Pero Moth (Pero mizon) – (photo © Jim Johnson)

Gray Spruce Looper Moth Caripeta divisata columbia county northwest oregon
Gray Spruce Looper Moth (Caripeta divisata) – (photo © Jen Sanford)
Northern Thallophaga Thallophaga hyperborea moth columbia county northwest oregon
Northern Thallophaga (Thallophaga hyperborea) – (photo © Jim Johnson)
October Thorn Tetracis jubararia moth columbia county northwest oregon
October Thorn (Tetracis jubararia) – (photo © Matt Hunter)
Brown-tipped Thorn Selenia alciphearia moth columbia county northwest oregon
Brown-tipped Thorn (Selenia alciphearia) – (photo © Jen Sanford)

Carpet Moths (subfamily Larentiinae)

Some moths in this group feed on non-living material including skins, furs, bird nests and pellets, and any manmade objects based on similar material including carpets and leather furniture.

Tissue Moth Triphosa haesitata columbia county northwest oregon
Tissue Moth (Triphosa haesitata) – (photo © Rob Foster)
Curvy Rivulet Perizoma curvilinea
Curvy Rivulet (Perizoma curvilinea) – (photo © Jim Johnson)
Grand Rivulet Perizoma grandis moth columbia county northwest oregon
Grand Rivulet (Perizoma grandis) – (photo © Matt Muir)
Western Bruce Spanworm Operophtera occidentalis moth columbia county northwest oregon
Western Bruce Spanworm (Operophtera occidentalis) – (photo © Jim Johnson)

Dark Marbled Carpet Moth Dysstroma citrata)
Dark Marbled Carpet Moth (Dysstroma citrata) – (photo © Jim Johnson)
Variable Carpet Moth Anticlea vasiliata
Variable Carpet Moth (Anticlea vasiliata) – (photo © Neil Gilham)
Guenée's Carpet Moth Ceratodalia gueneata
Guenée’s Carpet Moth (Ceratodalia gueneata) – (photo © natureguy)
Western Red Twin-spot Xanthorhoe defensaria columbia county northwest oregon
Western Red Twin-spot (Xanthorhoe defensaria) – (photo © Gavin Slater)

Barberry Geometer Moth Rheumaptera meadii columbia county northwest oregon
Barberry Geometer Moth (Rheumaptera meadii) -(photo © pumakit)
Bent-lined Carpet Moth Costaconvexa centrostrigaria columbia county northwest oregon
Bent-lined Carpet Moth (Costaconvexa centrostrigaria) – (photo © David Gardner)
Common Eupithecia Moth Eupithecia miserulata columbia county northwest oregon
Common Eupithecia Moth (Eupithecia miserulata) – (photo © Monica Krancevic)
Tawny Eupithecia Moth Eupithecia ravocostaliata
Tawny Eupithecia Moth (Eupithecia ravocostaliata) – (photo © Susan Blayney)

Barberry Geometer Moth larva Rheumaptera meadii caterpillar
Barberry Geometer Moth larva (Rheumaptera meadii) – (photo © crgillette)
Bent-lined Carpet Moth larva Costaconvexa centrostrigaria caterpillar columbia county northwest oregon
Bent-lined Carpet Moth larva (Costaconvexa centrostrigaria) – (photo © Elizabeth Crisfield)
Common Eupithecia Moth larva Eupithecia miserulata caterpillar columbia county northwest oregon
Common Eupithecia Moth larva (Eupithecia miserulata) – (photo © Margarita Lankford)
Tawny Eupithecia Moth larva Eupithecia ravocostaliata
Tawny Eupithecia Moth larva (Eupithecia ravocostaliata) – (photo © christine123)

Northwestern Phoenix Moth Eulithis xylina columbia county northwest oregon
Northwestern Phoenix Moth (Eulithis xylina) – (photo © Mark Nikas)
Small Phoenix moth Ecliptopera silaceata
Small Phoenix (Ecliptopera silaceata) – (photo © Stephen James McWilliam)
Coltsfoot Moth Enchoria lacteata columbia county northwest oregon
Coltsfoot Moth (Enchoria lacteata) – (photo © Gavin Slater)
Western White-Ribboned Carpet Mesoleuca gratulata moth columbia county northwest oregon
Western White-Ribboned Carpet (Mesoleuca gratulata) – (photo © John Rakestraw)

Emerald Moths (subfamily Geometrinae)

As you may have guessed, these moths are typically green in color.

Columbian Emerald Nemoria darwiniata moth columbia county northwest oregon
Columbian Emerald (Nemoria darwiniata) – Found in open woodland with relevant hardwoods. (photo © Ken-ichi Ueda)

Waves and Mochas (subfamily Sterrhinae)

Their name comes from the wavy patterns many have on their wings.

Simple Wave Scopula junctaria
Simple Wave (Scopula junctaria) – (photo © LapisOre)
Single-dotted Wave Idaea dimidiata
Single-dotted Wave (Idaea dimidiata) – (photo © John Vandermeulen)

Infant moth and relatives (subfamily Archiearinae)

The “infant moth” gets its name from the adults being among the first moths to emerge from their pupae very early in the spring.

Infant Moth Archiearis infans columbia county northwest oregon
Infant Moth (Archiearis infans) – Found in open woodland with relevant hardwoods. (photo © Merrill Peterson)
Infant Moth larva Archiearis infans caterpillar columbia county northwest oregon
Infant Moth larva (Archiearis infans) – Feeds on birch, alder, and willow, emerging early and eating buds before leaves have grown. (photo © Jeffrey Miller)

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