Light-pollution
Guides
Actias
Moon Moths, Asian-American Moon Moths
Actias is a genus of Saturniid moths commonly known as moon moths, distributed across Asia and the Americas. The genus is distinguished by elongated hindwing tails and includes well-known species such as the Luna moth (A. luna) of North America and the Spanish moon moth (A. isabellae) of Europe. Adult moths lack functional mouthparts, limiting their lifespan to several days to one week after emergence. Caterpillars feed on leaves of various woody plants including sweetgum, pine, hickory, walnut, and birch.
Actias luna
Luna Moth, North American Luna Moon Moth
Actias luna, the Luna moth, is a large, lime-green saturniid moth native to North America, recognized as one of the continent's most visually striking insects. Adults possess a wingspan reaching up to 114 mm (4.5 inches), with distinctive elongated hindwing tails and prominent eyespots that may confuse predators. The species exhibits strong sexual dimorphism: males have highly feathery antennae for detecting female pheromones, while females have slender antennae and larger abdomens. Larvae feed on a variety of broadleaf trees including sweetgum, hickory, walnut, birch, and sumac. The moth is univoltine in northern portions of its range, with larvae overwintering in leaf-litter-camouflaged cocoons before emerging as adults in spring; southern populations may produce two or three broods annually.
Bicellonycha
Bicellonycha is a genus of fireflies (Lampyridae) comprising more than 40 described species. Species within this genus exhibit diverse ecological tolerances, with some such as B. lividipennis showing adaptation to artificial night lighting and anthropogenic disturbance, while others including B. wickershamorum face conservation threats and have been petitioned for listing under the U.S. Endangered Species Act. The genus occurs primarily in the Americas, with documented presence in Brazil and the United States.
Eacles imperialis nobilis
Texas Imperial Moth
Eacles imperialis nobilis is a variety of the Imperial moth, commonly known as the Texas Imperial Moth. As a member of the giant silk moth family Saturniidae, it is a large, nocturnal species with vestigial adult mouthparts and larvae that feed on diverse woody vegetation. The variety designation suggests geographic differentiation within the broader Eacles imperialis complex, which ranges from Canada to Argentina. Like other Imperial moth populations, this variety faces threats from light pollution, habitat destruction, pesticides, and introduced parasitoid flies.
Eacles imperialis pini
Imperial moth (pini subspecies), pine-feeding Imperial moth
Eacles imperialis pini is a subspecies of the Imperial moth, a giant silk moth in the family Saturniidae. This subspecies is notable for its association with pine and other coniferous trees as larval hosts, distinguishing it from nominate populations that feed primarily on deciduous trees. Adults are large, visually striking moths with yellow and purple-brown patterning. The subspecies occurs in North America, with documented populations on Martha's Vineyard, Massachusetts, where it has persisted while other Imperial moth populations in New England have declined or been extirpated.
Operophtera
winter moths
Operophtera is a genus of geometrid moths comprising approximately four recognized species, including the economically significant winter moth (O. brumata) and Bruce spanworm (O. bruceata). The genus is notable for its unusual winter-active adult phenology, with adults emerging and mating during cold months when most other Lepidoptera are dormant. Several species have been introduced outside their native ranges, with O. brumata established as an invasive defoliator in North America. The genus has become a model system for studying hybrid zone dynamics, as O. brumata and O. bruceata form a documented clinal hybrid zone in the northeastern United States.
Photinus consanguineus
double cousin firefly
Photinus consanguineus, commonly known as the double cousin firefly, is a species of firefly in the genus Photinus found in eastern North America. Like other Photinus species, adults produce bioluminescent flashes through a chemical reaction involving luciferin and luciferase. Males fly and emit characteristic flash patterns to locate sedentary females, which respond with their own flashes to facilitate mating. The species faces threats from light pollution, habitat destruction, and lawn insecticides.
Photinus ignitus
Ignited Firefly
Photinus ignitus is a North American firefly species distinguished by its bioluminescent courtship displays. Males produce characteristic flash patterns to attract females, who respond from perches in vegetation. Research has documented seasonal plasticity in female mate choice behavior, with females becoming less selective as the breeding season progresses. Like other Photinus species, it produces defensive compounds called lucibufagins that protect against predators.
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Pale Firefly
Photinus scintillans is a species of firefly in the family Lampyridae, commonly known as the Pale Firefly. Like other Photinus species, adults produce bioluminescent signals through a chemical reaction involving luciferin and luciferase. Males fly and emit characteristic flash patterns to attract females, which remain stationary in vegetation and respond with their own signals. The species is subject to predation by Photuris fireflies, which mimic their flash patterns to lure and consume males.
Photinus tenuicinctus
thinly-girdled firefly, Ozark spark
Photinus tenuicinctus is a firefly species endemic to the Ozark Mountains of Arkansas and Oklahoma. Adults measure 8.5–11.5 mm in length. Males are fully winged and capable of flight, while females are brachypterous and flightless. The species exhibits sexual dimorphism in both morphology and bioluminescent signaling.
Pyractomena linearis
Marsh Gray Firefly
Pyractomena linearis is a firefly species in the beetle family Lampyridae, described by LeConte in 1852. It is a wetland specialist with a broad but sparsely documented range across the northern United States and southern Canada. The species faces documented threats from habitat destruction and light pollution. Recent observations are scarce despite its extensive historical range.
Pyractomena marginalis
Marginal firefly
Pyractomena marginalis is a species of firefly in the beetle family Lampyridae, described by Green in 1957. It is native to North America with a historically scattered distribution across the eastern United States, from eastern Texas north to southern Maine. Recent observations suggest the species has become restricted primarily to the Appalachian Mountains, though uncertainty persists due to identification difficulties and lack of comprehensive surveys. The species faces potential threats from light pollution.
Rothschildia lebeau
Lebeau's Silk Moth, Forbes Moth
Rothschildia lebeau is a giant silkmoth in the family Saturniidae, distributed from the Lower Rio Grande Valley through eastern Mexico to Brazil. Adults are short-lived and do not feed, relying on fat reserves accumulated during larval development. The species exhibits a life history tradeoff between larval survival and adult body size based on host plant quality, with larger males showing higher mating success.
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Small Ermine Moths
Yponomeuta is a large genus of small moths in the family Yponomeutidae, comprising 103 described species. Commonly known as Small Ermine Moths, members of this genus are notable for their distinctive defensive behavior: several species emit warning clicks during flight to signal their unpalatability to bat predators. Research on Yponomeuta cagnagella has demonstrated rapid evolutionary adaptation to urban environments, with populations exposed to long-term light pollution showing reduced attraction to artificial light sources compared to those from dark areas.
Yponomeuta cagnagella
Spindle Ermine, Spindle Ermine Moth
Yponomeuta cagnagella, the spindle ermine moth, is a small ermine moth in the family Yponomeutidae with a wingspan of 19–26 mm. Adults are white with distinctive black dot patterns on the forewings and dark grey hindwings. The species is notable for its larval habit of producing extensive protective webbing on host plants and has been studied for urban adaptation to light pollution.
Yponomeuta multipunctella
American Ermine Moth
Yponomeuta multipunctella, commonly known as the American Ermine Moth, is a small moth in the family Yponomeutidae. It belongs to a genus noted for larvae that construct communal silk webs on host plants. The species is recorded from the northeastern United States, particularly Vermont. As a member of the Yponomeuta genus, it shares behavioral traits with related species, including flight-to-light behavior that has been demonstrated to vary under selection pressure from artificial light pollution.