Autumn
Guides
Acholla
Autumn Assassins
Acholla is a genus of assassin bugs (Reduviidae) in the tribe Harpactorini. Adults are most conspicuous in autumn, though they can be found from July onward in some regions. The genus contains three recognized species: A. multispinosa (widespread in eastern and central North America), A. ampliata (western North America), and A. tabida (California and Mexico). These predatory true bugs are primarily arboreal and associated with woodlands and orchards.
Acholla multispinosa
Acholla multispinosa is a species of assassin bug in the family Reduviidae. It is the most widespread species in its genus, occurring across eastern North America from New England south through the Appalachians to Tennessee and North Carolina, and west through the Great Lakes region to Kansas, Nebraska, and southeast Iowa. Adults are most conspicuous in autumn, though they can be found beginning in July. The species is arboreal, primarily inhabiting woodlands and orchards.
Acmaeodera scalaris
ladder buprestid
Acmaeodera scalaris, commonly known as the ladder buprestid, is a metallic wood-boring beetle in the family Buprestidae. It occurs across Central America and North America. The species has been documented visiting flowers of various composite and other plant species, particularly in arid and semi-arid regions of the southwestern United States and northern Mexico.
Araneus gemma
Gem-shaped Orbweaver, cat-faced spider, jeweled orbweaver spider
Araneus gemma is a common outdoor orb-weaver spider native to western North America. It is one of several species commonly called the "cat-faced spider" due to abdominal markings resembling feline features. The species is harmless to humans despite possessing venom containing argiotoxin, a neurotoxin that antagonizes glutamate. It constructs typical circular orb webs and is frequently encountered in residential areas during autumn when mature females become conspicuous.
Cicindela nigrior
Autumn Tiger Beetle
Cicindela nigrior, commonly known as the autumn tiger beetle, is a species of flashy tiger beetle in the family Cicindelidae. It is found in North America. The species belongs to the genus Cicindela, a group of charismatic predatory beetles known for their speed, large eyes, and hunting behavior. Like other tiger beetles, it likely inhabits open, sandy habitats, though specific habitat details for this species are not well documented in available sources.
Conocephalus brevipennis
Short-winged Meadow Katydid
The short-winged meadow katydid (Conocephalus brevipennis) is a small, flightless katydid native to North America and the Caribbean. Males produce species-specific stridulations by rubbing forewing structures together to attract mates. Females are distinguished by a prominent sword-like ovipositor used to deposit eggs in protected locations. The species is active primarily in late summer and autumn.
Copaeodes aurantiaca
orange skipperling
Copaeodes aurantiaca, commonly known as the orange skipperling, is a grass skipper in the family Hesperiidae. It is native to Central America and North America, with documented presence in the southwestern United States including Arizona. The species is active during late summer and early autumn, and has been observed in botanical gardens and natural habitats with abundant flowering vegetation.
Elaphria trolia
A small North American owlet moth in the family Noctuidae. Adults are attracted to light sources. The species is part of the diverse Elaphria genus, which includes several similar-looking small moths often active in autumn.
Eristalis flavipes
orange-legged drone fly
Eristalis flavipes, commonly known as the orange-legged drone fly, is a North American hoverfly in the family Syrphidae. Adults are striking mimics of bumblebees, measuring 13–17 mm in length, with abundant bright yellow pile on a black body and distinctive orange-red legs. The species is active from early April through mid-October, occurring across diverse habitats with particular affinity for wetlands. Adults visit flowers for nectar and pollen, while larvae are aquatic rat-tailed maggots that filter-feed in standing water.
Fucellia assimilis
Fucellia assimilis is a species of fly in the family Anthomyiidae, described by Malloch in 1918. The species has been documented as occurring in New England, where it has been observed entering homes in autumn and winter. It belongs to a genus whose members are often associated with coastal and shoreline habitats. Available information on this species is limited, with only six observations recorded on iNaturalist and minimal published biological data.
Gyponana gladia
Gyponana gladia is a species of leafhopper in the family Cicadellidae, first described by DeLong in 1942. Like other members of its genus, it possesses distinctive brochosomes—nanoparticles produced in the Malpighian tubules that create a superhydrophobic, anti-reflective coating on the body and wings. The species has been documented at blacklight traps in autumn, suggesting nocturnal activity patterns. It is one of many small, often overlooked leafhopper species that contribute to the high diversity of Hemiptera in North American temperate regions.
Homoneura conjuncta
Homoneura conjuncta is a species of small fly in the family Lauxaniidae, commonly known as lauxaniid flies. The genus Homoneura is characterized by often colorful or patterned species, with H. conjuncta specifically noted for its orange coloration. The species has been observed in association with decaying pumpkins and other fermenting organic matter. It is known from limited distribution records in the northeastern United States.
Homoneura houghii
Homoneura houghii is a species of fly in the family Lauxaniidae, first described by Coquillett in 1898. The genus Homoneura comprises small to medium-sized flies commonly found in association with decaying organic matter. Observations suggest this species exhibits orange coloration, though detailed biological information remains limited.
Homoneura incerta
Homoneura incerta is a species of fly in the family Lauxaniidae, originally described as Sapromyza incerta by Malloch in 1914. The species has been documented in association with decaying organic matter, including pumpkins and other fermenting fruits. It exhibits a distinctive orange coloration that has been noted by observers. Distribution records indicate presence in the northeastern United States, particularly Vermont.
Homoneura littoralis
Pumpkin-orange Homoneura, Orange Lauxaniid Fly
Homoneura littoralis is a small fly in the family Lauxaniidae, recognized by its distinctive pumpkin-orange coloration. The species was described by Malloch in 1915 and has been documented in association with decaying organic matter, including fermenting pumpkins. Adults are attracted to decomposing fruit where they feed and presumably breed. The species belongs to a genus of small, often colorful flies that are frequently overlooked due to their minute size but can be striking under magnification.
Homoneura philadelphica
Homoneura philadelphica is a small fly in the family Lauxaniidae, a group commonly known as lauxaniid flies. The species is noted for its distinctive orange coloration, which has been observed in individuals attracted to decaying pumpkins. It is one of many species in the genus Homoneura, which contains numerous small, often colorful flies found in various habitats across North America.
Leptophyes punctatissima
Speckled Bush-cricket
Leptophyes punctatissima, commonly known as the Speckled Bush-cricket, is a flightless bush-cricket species distributed across most of Europe. It belongs to the subfamily Phaneropterinae and exhibits distinctive acoustic behavior where both sexes stridulate. Males produce calling songs to which females respond with brief chirps, creating a duetting communication system. The species has been studied extensively for its auditory physiology and directional hearing capabilities.
Macronoctua onusta
iris borer, Iris Borer Moth
Macronoctua onusta, commonly called the iris borer, is a noctuid moth native to North America. Adults are large, dull brown moths with distinctive smoky dark gray patterning and a uniquely shaped reniform spot. The species is a foodplant specialist whose larvae bore into the rhizomes of iris plants, making it a notable pest in gardens and horticulture. Adults fly in autumn, primarily September and October.
Megatibicen pronotalis
Walker's Annual Cicada, Walker's cicada
Megatibicen pronotalis, commonly known as Walker's Annual Cicada or Walker's cicada, is a species of cicada in the family Cicadidae. It is found in the northern Great Plains of the United States and has been reported from states including Illinois, Kansas, Kentucky, Alabama, and Florida. Males produce sound using tymbals—hardened membranes under plates on the venter at the base of the abdomen—and are reportedly among the loudest insects in the world. The species is often associated with riparian cottonwood (Populus) and willow (Salix) habitats.
Muscina levida
Dark-horned Muscina
Muscina levida is a muscid fly species in the family Muscidae, commonly known as the Dark-horned Muscina. It is found in Europe, with records from Belgium, Denmark, Norway, and the Azores. The species is one of several Muscina flies associated with decomposing organic matter and has been observed in indoor settings during autumn and winter.
Neoconocephalus retusus
Round-tipped Conehead
Neoconocephalus retusus, commonly known as the round-tipped conehead, is a species of katydid in the family Tettigoniidae. Adults range from 37 to 52 mm in length and are active during late summer and autumn. The species is found in the eastern United States and southern Canada, typically in wet grassy and weedy habitats.
Nomotettix cristatus
crested pygmy grasshopper, crested grouse locust, northern crested grouse locust
Nomotettix cristatus is a small pygmy grasshopper in the family Tetrigidae, commonly known as the crested pygmy grasshopper or crested grouse locust. It is one of approximately 35 Nearctic species of Tetrigidae. The species exhibits three recognized subspecies with distinct geographic distributions across North America. Like other members of its family, it is characterized by an elongated pronotum that extends over the abdomen, a trait distinguishing pygmy grasshoppers from typical grasshoppers in Acrididae.
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stemhumanRelevanceinteraction-with-humanssimilarTaxamust-include-reasonmisconceptionsonly-if-meaningfulextraDetailsimportant-additional-contextSTYLE-RULESclear-direct-sentencesavoid-fluff-filler-languagerepeating-taxonomy-in-proseoverly-technical-jargonconcrete-statementsabstract-descriptionsQUALITY-RULEScompleteness-highmost-fields-well-supportedcompleteness-mediumpartial-but-reliablecompleteness-lowsparse-datahasInferredContenttrue-ONLY-if-generalization-usedotherwise-falseOUTPUT-FORMATstrictly-match-JSON-schemano-extra-fieldsno-commentary-outside-JSONwater-associatedthree-subspeciesN.-c.-cristatusN.-c.-compressusN.-c.-floridanussmall-size399-observationsexact-matchmedium-completenessno-inferred-contentfactual-correctness-prioritizedconservative-approachinformative-contentno-fluffno-vague-generalizationscautious-language-where-neededno-fabricationunique-field-contentfocused-sectionsJSON-schema-complianceno-commentaryPapaipema cerina
golden borer moth
Papaipema cerina, the golden borer moth, is a bright yellow noctuid moth found in the Great Lakes region of North America. Adults are active from September through mid-October. The species is uncommon to rare and is associated with diverse wetland and forest habitats. Larvae are borers that feed on lilies, May apple, and certain grass species.
Patalene
Patalene is a genus of geometer moths in the family Geometridae, established by Herrich-Schäffer in 1854. The genus contains three species in the Nearctic region. These moths are part of the diverse geometrid fauna that includes many bark- and twig-mimicking species. One species, Patalene olyzonaria, has been documented visiting blacklight traps in late autumn.
Polistes dominula
European Paper Wasp
Polistes dominula is a highly successful invasive social wasp native to Eurasia that has established populations across North America, South America, New Zealand, South Africa, and other regions. First detected in North America near Boston in 1978, it has become one of the most abundant wasps on the continent. The species builds small, exposed paper nests in protected locations and preys primarily on live insects, particularly caterpillars. Unlike yellowjackets, it does not scavenge for meat or sugar. Its rapid spread has been attributed to ecological flexibility, superior competitive ability, and tolerance of human-altered environments.
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kelp crabs
Pugettia is a genus of marine kelp crabs in the family Epialtidae, distributed across the North Pacific from North America to East Asia. Species inhabit shallow subtidal zones, primarily associated with macroalgal habitats including kelp beds, Sargassum stands, and red algal turfs. Many species exhibit ontogenetic habitat shifts, with juveniles and smaller individuals occupying deeper algal turfs while larger adults migrate to shallower macroalgal beds. The genus includes approximately 25 extant species plus one fossil species, with several species serving as important subjects for studies of crab growth, reproduction, and habitat ecology.
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diadema
Spined Assassin Bug
Sinea diadema is a North American assassin bug in the family Reduviidae, commonly known as the spined assassin bug. The species exhibits bivoltine life history, with adults active primarily in late summer and autumn. It is an active predator of small insects, often associated with flowering plants in open habitats. The species overwinters in the egg stage.
Sympetrum corruptum
Variegated Meadowhawk
Sympetrum corruptum, commonly known as the Variegated Meadowhawk, is a migratory dragonfly native to North America. It is one of five species tracked by the Migratory Dragonfly Partnership due to its seasonal north-south movements. Adults are notable for their distinctive red-marked coloration and persistence late into autumn, often being the last active dragonflies in many areas. The species is abundant in diverse habitats including wetlands, grasslands, and even agricultural areas like lavender fields.
Sympetrum vicinum
Autumn Meadowhawk, Yellow-legged Meadowhawk
Sympetrum vicinum is a small dragonfly in the skimmer family Libellulidae, commonly known as the Autumn Meadowhawk or Yellow-legged Meadowhawk. Adults measure 26–35 mm in length and are distinguished by their yellow legs and late-season flight period. This species exhibits two disjunct populations in North America—one in the eastern United States and Canada, and another in the Pacific Northwest. It is notable for flying later into autumn than any other dragonfly species in its western range, with observations extending into November.
Tipula ultima
crane fly
Tipula ultima is a species of large crane fly in the family Tipulidae. It was originally described as Tipula flavescens by Fabricius in 1805, but that name was preoccupied. Charles Howard Alexander proposed the replacement name ultima in 1915. The specific epithet refers to its late-season flight period; this species flies later in the year than most other crane flies. It is found across much of Canada and the United States.
Trachelas tranquillus
Broad-faced Sac Spider, Ground Sac Spider
Trachelas tranquillus, commonly known as the broad-faced sac spider, is a hunting spider native to eastern North America. This species is frequently encountered indoors during autumn when males wander in search of mates. It does not construct webs for prey capture but instead hunts actively at night, often around porch lights where insects congregate. Once considered mildly venomous to humans, it is now classified as harmless, though rare bites can cause localized pain and swelling.