Single-brooded
Guides
Agapema dyari
Chihuahuan Agapema
Agapema dyari is a giant silkmoth in the family Saturniidae, endemic to the Chihuahuan Desert region of the southwestern United States and northern Mexico. The species is characterized by distinctive wing patterning and is among the smaller members of the genus Agapema. Adults are short-lived and do not feed; their primary function is reproduction. Larvae feed on specific host plants, though detailed life history documentation remains limited.
Anisota virginiensis virginiensis
Pink-striped Oakworm
A large, strikingly colored caterpillar found feeding on oak foliage in eastern North America. The larva is black with prominent pink or orange longitudinal stripes and bears a pair of black horn-like projections on the thorax. Adults are furry, tan to reddish-brown moths with reduced mouthparts that do not feed. The subspecies is distinguished from nominate A. virginiensis by geographic range and subtle phenotypic differences.
Apamea zeta
Northern Arches, Zeta Moth
Apamea zeta is a medium-sized noctuid moth with a Holarctic distribution spanning Europe and northern North America. Adults are active from July to August in Britain and display variable gray-green forewings with distinctive black markings. The species exhibits notable morphological variation across its range, with several described forms and subspecies. Larvae are cutworms that feed on grasses, including fescues in alpine tundra habitats.
Argyresthia pygmaeella
Sallow Argent
A small microlepidopteran moth in the family Argyresthiidae, first described from Vienna, Austria in 1775. Adults are active from May to August with a single annual generation. The species is associated with willows, where larvae mine leaf-buds and shoots. It has a broad distribution across Europe, northern Asia, and North America.
Calephelis borealis
Northern Metalmark
Calephelis borealis, the northern metalmark, is a small butterfly in the family Riodinidae endemic to the eastern United States. It is one of few tropical-associated riodinids found in eastern North America. The species has declined across its range due to habitat loss from afforestation and invasive plant encroachment. Active management including canopy thinning and invasive plant removal has been shown to increase local populations.
Carsia sororiata
Manchester Treble-bar, Manchester Treble-bar Moth
Carsia sororiata is a geometrid moth with a Holarctic distribution spanning northern and central Europe through Siberia to the Russian Far East and northern Mongolia, with a separate North American range from Alaska to Newfoundland and New Hampshire. Adults are active from July to August. The species exhibits notable wing pattern variation across its range, with several described subspecies.
Catocala serena
Serene Underwing
Catocala serena, the serene underwing, is a moth in the family Erebidae. It is found in eastern North America from southern Ontario and New England south to Tennessee, and west to Illinois and eastern Wisconsin. Adults are active from July to September with one generation per year. The larvae feed on shagbark hickory (Carya ovata) and black walnut (Juglans nigra).
Cercyonis pegala
Common Wood-Nymph, Wood-Nymph, Grayling, Blue-Eyed Grayling, Goggle Eye
Cercyonis pegala is a widespread North American satyrine butterfly commonly known as the Common Wood-Nymph. It occupies diverse open habitats including grasslands, meadows, and woodland edges across much of the continent. The species exhibits notable variation in wing pattern across its range, with coastal and interior populations showing consistent differences in eyespot size and number. Unlike some congeners, it remains common and broadly distributed, though habitat loss affects local populations.
Diachrysia balluca
green-patched looper, hologram moth
Diachrysia balluca is a large noctuid moth occurring in northeastern North America, recognized by its metallic green forewing patches. Adults are active from May through September, with peak abundance in July. The species inhabits mature poplar and mixedwood forests, where larvae feed on woody plants including quaking aspen and Canadian woodnettle. It produces one brood annually.
Euchloe hyantis
pearly marble, pearly marblewing, California marble
A small Pieridae butterfly of western North America with distinctive marbled underwings. Adults fly in spring and early summer, with one generation annually. Males exhibit hilltopping behavior along ridgelines. The species has been documented feeding on Brassicaceae flowers and fruits, particularly Streptanthus species. Chrysalids overwinter.
Eueretagrotis attentus
Attentive Dart, Daggered Heath Dart
A medium-sized noctuid moth with a wingspan of 30–35 mm, found across eastern and central North America from Nova Scotia to Saskatchewan, with southern extensions along the Appalachian Mountains. Adults are active from June to August with a single annual generation. Larvae feed on a range of woody and herbaceous plants including Vaccinium, Salix, Betula alleghaniensis, Sambucus, and Fragaria. The species is known by two common names: Attentive Dart and Daggered Heath Dart.
Eufidonia notataria
Powder Moth
Eufidonia notataria, commonly known as the powder moth, is a North American geometrid moth with a wingspan of 22–27 mm. Adults are active from May to July with a single annual generation. The larvae feed on coniferous trees including balsam fir, eastern hemlock, eastern larch, and spruces.
Euphyia intermediata
Sharp-angled Carpet, American Sharp-angled Carpet
Euphyia intermediata is a small geometrid moth commonly known as the sharp-angled carpet or American sharp-angled carpet. The species was first described by Guenée in 1858 and was long confused with the European Euphyia unangulata until recognized as distinct in 1999. It has a broad transcontinental distribution across northern North America and is active from spring through late summer.
Hesperia dacotae
Dakota skipper
Hesperia dacotae, the Dakota skipper, is a small to medium-sized North American butterfly in the family Hesperiidae. Adults are active for approximately three weeks during June and July, their entire lifespan. The species inhabits native tallgrass prairie and has experienced significant population declines due to prairie destruction and modification. Listed as Threatened under the U.S. Endangered Species Act since 2014, it has been extirpated from Illinois and Iowa, with its largest remaining population in North Dakota.
Hesperia sassacus
Indian Skipper
Hesperia sassacus, commonly known as the Indian skipper, is a small butterfly in the family Hesperiidae. It occurs in northeastern North America, with a wingspan of 25–30 mm. Adults fly from late May to early July. The species has three recognized subspecies, with larvae feeding on various native grasses.
Limenitis weidemeyerii
Weidemeyer's Admiral
Weidemeyer's Admiral is a medium-sized butterfly in the brush-footed family Nymphalidae, found across western North America from the Rocky Mountains to the Sierra Nevada and California. Adults display distinctive black and white dorsal wing patterns with rows of white spots, while the ventral surface shows brown with gray marginal markings. The species is named after 19th-century entomologist John William Weidemeyer, whose Rocky Mountain specimen was used for the original description. Larvae develop on woody plants in the genera Populus, Salix, Holodiscus, and Amelanchier, while adults feed on tree sap, carrion, and flower nectar.
Lycaena mariposa
Mariposa copper
Lycaena mariposa, the mariposa copper, is a small butterfly in the family Lycaenidae. It occurs in western North America, where adults are active in mid-summer. The species has a wingspan of 23–28 mm and exhibits the copper-orange coloration typical of its genus. Larvae feed on specific host plants including Vaccinium arbuscula and Polygonum douglasii. Two subspecies are recognized: L. m. penroseae and L. m. charlottensis.
Megisto rubricata
Little Wood Satyr
Megisto rubricata, the Little Wood Satyr, is a small to medium-sized satyrine butterfly found in eastern North America. The species was originally described by William Henry Edwards in 1871 and has been transferred to the genus Euptychia in some taxonomic treatments, though Megisto remains widely used in North American literature. Adults are characterized by their brown coloration with distinct eyespots on the wings. The species inhabits woodland edges and openings where its larval host grasses grow.
Oeneis uhleri uhleri
Uhler's Arctic
Oeneis uhleri uhleri is a subspecies of Arctic butterfly in the family Nymphalidae. It occurs in the western United States and Canada, inhabiting high-elevation mountain environments. Like other members of the genus Oeneis, it is associated with alpine and subalpine habitats. The species has been documented from the Rocky Mountain region northward into the Canadian prairie provinces.
Parnassius clodius
Clodius Parnassian, American Apollo
Parnassius clodius is a cold-adapted white butterfly in the snow Apollo genus, found in western North America from sea level to alpine zones. It inhabits diverse environments including coastal forests, sagebrush meadows, and subalpine habitats. The species is a model organism for studying thermal ecology and climate change impacts on high-elevation insects. Adults are poor dispersers with limited gene flow between populations. Larvae are specialized herbivores of Dicentra species and exhibit behavioral thermoregulation.
Rheumaptera undulata
scallop shell
Rheumaptera undulata, commonly known as the scallop shell, is a geometrid moth with a wingspan of 25–30 mm. The species is characterized by pale forewings with numerous darker, wavy, evenly spaced crosslines and a scalloped fringe on the outer margin. It was first described by Carl Linnaeus in 1758 and occurs across the Palearctic realm and North America. Adults are active from late May to August in Europe, with one generation per year. The larvae feed on a diverse range of woody plants including birch, willow, Vaccinium species, aspen, and others.
Satyrium caryaevorus
Hickory Hairstreak
Satyrium caryaevorus, the hickory hairstreak, is a small butterfly in the family Lycaenidae. It is found in eastern North America, where adults are active during summer months. The species has one generation per year and overwinters as an egg. Larvae feed primarily on hickory and related tree species, while adults visit flowers for nectar.
Speyeria cybele letona
Great Spangled Fritillary (western subspecies)
Speyeria cybele letona is a western North American subspecies of the great spangled fritillary, a large brush-footed butterfly with a wingspan of 2.25 to 4 inches. Research on Speyeria cybele indicates that visual perception is the primary sense used for navigation to suitable habitat patches, with individuals capable of detecting and navigating to target islands from distances up to 60 meters. The subspecies exhibits the orange-brown coloration typical of western populations of this species, in contrast to the more orange eastern populations.
Zale helata
Brown-spotted Zale Moth
Zale helata, commonly known as the brown-spotted zale moth, is a noctuid moth species first described by Smith in 1908. It inhabits barrens and pine woodlands across central and eastern North America. Adults are active from May to June with a single generation per year. The species has a wingspan of 35–41 mm.