Identification, Images, & Information
For Insects, Spiders & Their Kin
For the United States & Canada
Clickable Guide
Moths Butterflies Flies Caterpillars Flies Dragonflies Flies Mantids Cockroaches Bees and Wasps Walkingsticks Earwigs Ants Termites Hoppers and Kin Hoppers and Kin Beetles True Bugs Fleas Grasshoppers and Kin Ticks Spiders Scorpions Centipedes Millipedes

Upcoming Events

Photos of insects and people from the 2022 BugGuide gathering in New Mexico, July 20-24

National Moth Week was July 23-31, 2022! See moth submissions.

Photos of insects and people from the Spring 2021 gathering in Louisiana, April 28-May 2

Photos of insects and people from the 2019 gathering in Louisiana, July 25-27

Photos of insects and people from the 2018 gathering in Virginia, July 27-29

Photos of insects and people from the 2015 gathering in Wisconsin, July 10-12

Previous events


Species Hypagyrtis unipunctata - One-spotted Variant - Hodges#6654

One-spotted Variant Moth - 6654 - Dorsal - Hypagyrtis unipunctata Hypagyrtis unipunctata Zale? moth - Hypagyrtis unipunctata Hypagyrtis unipunctata - male Lake Crabtree caterpillar on Betula nigra Geometrid 2020 4 - Hypagyrtis unipunctata 6654 – Hypagyrtis unipunctata – One-spotted Variant Moth (early instar) - Hypagyrtis unipunctata Caterpillar - Hypagyrtis unipunctata Hypagyrtis unipunctata
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 Ennominae
Tribe Bistonini
Genus Hypagyrtis
Species unipunctata (One-spotted Variant - Hodges#6654)
Hodges Number
Other Common Names
adult called 'White Spot' in Europe (UK Moths)
Synonyms and other taxonomic changes
Hypagyrtis unipunctata (Haworth)
Orig. Comb: Phalaena unipunctata Haworth, 1809
4 Nearctic spp.
wingspan 20-47 mm
Highly variable, see images at MPG
Adult: note scalloped hindwing; extremely variable sexually, seasonally, and geographically; both sexes yellowish-tan to orangish, mottled with white, brown, and blackish; lines and discal spots on all wings black; forewing has pale subterminal spot near costa; colors in spring specimens contrast more than in summer brood; females usually larger with more deeply-scalloped hindwing; melanics commonly occur but paler spot still visible near forewing apex [description by Charles Covell]
Larva: body cylindrical, mottled in grays and reddish-brown with faint longitudinal streaking, lacking conspicuous warts, humps, or other distinctive characters; ventral side of third thoracic segment modestly thickened; often with small pale lateral spots on first abdominal segment just above and behind spiracle; head mottled, with markings coalescing into darker area above triangle; dorsum of eighth segment sometimes with pale spots; last abdominal segment with lateral anal spurs (paraprocts) little more than nubs [description by David Wagner and Valerie Giles]
e. N. Amer. to BC and WA - Map (MPG)
also occurs in Eurasia
deciduous and mixed woods; adults are nocturnal and attracted to light
adults fly from April to September; June and July in the north (Alberta)
larvae may be present at any time of year. Golden crowned kinglets feed on caterpillars in the middle of winter in Maine (Heinrich, Bernd. Winter World)
larvae feed on leaves of alder, apple, ash, basswood, birch, cherry, dogwood, elm, fir, hazel, hickory, maple, oak, pine, poplar, rose, serviceberry, willow
Life Cycle
one or two generations per year; overwinters as a larva

early instar larva; larva; mature larva; adult
larvae overwinter exposed on tree bark and branches, and are important food sources for wintering insectivorous birds in the east
See Also
Hypagyrtis esther (Esther Moth) is similar but usually has darker wings that are evenly violet-gray and not mottled
Hypagyrtis piniata (Pine Measuringworm Moth) lacks orangish-brown shading in the subterminal area, and has a white irregular inconspicuous spot near the forewing costa (Compare images of both species)
Distinction between unipunctata and esther by external appearances not reliable. See Bob Belmont's Variant Page at MPG.
Internet References
live adult images (Darryl Searcy, Alabama)
overview including habitat, seasonality, description, biology, food plants, distribution (Strickland Entomological Museum, U. of Alberta)
live larva image plus pinned adult image and same info as in link below (Pedro Barbosa, U. of Maryland)
live larva image plus description, food plants, biology (David Wagner and Valerie Giles, Caterpillars of Eastern Forests; USGS)
common name reference [One-spotted Variant] (NHIC; Ontario Ministry of Natural Resources)
common name reference [White Spot] (Checklist of UK Macro Moths)
food plants; PDF doc plus flight season and life cycle (Macrolepidoptera of Mont Saint-Hilaire Region, McGill U., Quebec)
distribution in Canada list of provinces (CBIF)
synonyms and references (Markku Savela, FUNET)