Eastern-us
Guides
Acentrella nadineae
small minnow mayfly
Acentrella nadineae is a small minnow mayfly in the family Baetidae. The species was described in 2009 and remained known only from nymphs until successful rearing produced the first documented adults. It inhabits cool, clean, swift rocky streams across parts of the eastern and midwestern United States. Near final instar nymphs exhibit unusual madicolous behavior, living in thin water films on rock surfaces.
Acrolophus propinqua
Walsingham's Grass Tubeworm Moth
Acrolophus propinqua, commonly known as Walsingham's Grass Tubeworm Moth, is a small moth in the family Acrolophidae. The species is found across the eastern and southeastern United States, with a wingspan of 22–26 mm. As with other members of the genus, the caterpillars construct silken tubes at the base of grasses or grass roots for concealment while feeding.
Allocapnia rickeri
Midwest Snowfly
Allocapnia rickeri is a small winter stonefly in the family Capniidae, commonly known as the Midwest Snowfly. It is one of numerous small, dark stoneflies in the genus Allocapnia that emerge during cold months when few other insects are active. The species has been documented across the central and eastern United States. Like other capniids, it is associated with clean, cold streams and is an important indicator of water quality.
winter-stoneflybioindicatorcoldwaterPlecopteraCapniidaeAllocapnialoticemergencebrachypteryapterygenitalia-identificationFrison-1942Midwestsoutheastern-USclean-water-indicatorJanuary-Marchsmall-stoneflywingless-femalestream-insectshreddergathererseasonal-resourcewater-qualityaquatic-insectterrestrial-adultshort-lived-adultovipositionsubmerged-eggshigh-dissolved-oxygenlow-temperaturecentral-USeastern-USAlabamaArkansasDelawareGeorgiaIllinoishexapodhemimetabolousEuholognathaNemouroideaArctoperlariaInsectaArthropodaAnimaliaGBIFCatalogue-of-LifeiNaturalistNCBItaxonomyaccepted-species1942FrisonRickerMidwest-Snowflysnowflysmall-dark-stoneflyclean-streamsriverswell-oxygenatedlotic-habitatcold-monthswinter-activitywing-reductionfemale-apterymale-flightepiproctparaproctterminaliataxonomic-revisioncongenersdistribution-recordsobservations9-observationseukaryotemetazoanarthropodinsectstoneflywinter-emergingJanuaryFebruaryMarchcold-weathernear-freezingbelow-freezingwater-surfacesubmerged-substratesallochthonous-organic-materialstream-ecosystemsseasonal-food-resourceinsectivorous-birdspredatorsscarce-preyunpollutedno-economic-importancestream-monitoringwater-quality-indicatorhigh-quality-coldwatermicroscopic-examinationtaxonomic-keysmale-terminaliareliable-separationgenitalic-examinationoverlapping-distributionsimilar-habitatsmall-sizeunder-10-mmbody-lengthreduced-wingsabsent-wingsfully-developed-wingsspecific-identificationpublished-descriptionsillustrationssubsequent-revisionscharacteristicfamily-Capniidaecommon-nameextended-nymphal-periodone-to-two-yearsshort-liveddoes-not-feedaquatic-nymphclean-cold-streamslow-temperaturesyear-roundwinter-monthsJanuary-through-Marchfamilycentered-Midwestextends-southeasternUnited-Statesdocumentedappearsmost-reliablydistinguishedsubtle-differencesterminal-abdominal-structuresshould-be-comparedagainstpublishedsubsequentgenus-levelcharacterizedreducedabsentfemalesfully-developedmalesrequires-examinationmale-genitaliastructureparaproctsreliableseparationoverlapssimilarmanyexternallydefinitivereliesmicroscopicexaminationcomparisonkeysusedbiologicalindicatorprogramspresenceindicatescoldconditionsno-directeconomicimportanceshreddersgatherersprocessingallochthonousorganicmaterialstreamecosystemsseasonalfoodresourceinsectivorousbirdsotherwhenalternativepreyscarceserveshigh-qualityhabitatsdevelopmentaquaticnymphalstagesterrestrialadultstagenymphsdevelopstreamsextendedperiodlikelyonetwoyearsbasedrelatedspeciesadultsdo-notfeedactiveduringweatherairtemperaturesmaynearbelowfreezingwingedcapableflightwinglessshort-wingedremainwatersurfacematingoccurwinterenteringdepositeggssubmergedsubstratessmallcommonlyknownnumerousdarkemergefewinsectscentraleasternassociatedcleanimportantundermmbodylengthmembersgenuswingspossessfullydevelopedspecificidentificationlevelwithinrequiresmalegenitaliaparticularlymostreliablysubtledifferencestheseterminalabdominalstructuresshouldcompareddescriptionstaxonomicrevisionswinter-emergingmaintainlowhighdissolvedoxygenlevelsthroughoutyearUnitedStatesdistributioncenteredextendssoutheasternmonthstypicallythroughthisactivitygivesrisecommonnamedonotprovidesqualitymonitoringnodirecthabitatmorphologysizegenitalicCalopteryx angustipennis
Appalachian jewelwing
Calopteryx angustipennis, the Appalachian jewelwing, is a large damselfly endemic to the eastern United States. It inhabits rocky rivers and streams with cold, fast-flowing water, particularly in woodland settings. Adults are active from spring through summer, with emergence timing varying by latitude.
Ceuthophilus guttulosus nigricans
Ceuthophilus guttulosus nigricans is a subspecies of camel cricket in the family Rhaphidophoridae. Like other members of the genus Ceuthophilus, it is wingless, nocturnal, and adapted to dark, humid environments. The subspecies designation indicates darker coloration compared to the nominate form. It has been recorded in the eastern United States from Indiana to North Carolina.
Coptotriche castaneaeella
Chestnut Blotchminer Moth
A small moth in the family Tischeriidae, described in 1875. The larvae are leaf miners on multiple oak species, creating distinctive trumpet-shaped mines. Recorded from six US states in the eastern and midwestern regions.
Erynnis horatius
Horace's duskywing
Erynnis horatius, commonly known as Horace's duskywing, is a skipper butterfly in the family Hesperiidae. It is distributed across much of the eastern and central United States, with populations extending from Massachusetts to Florida and westward to the Great Plains and southwestern states. The species exhibits sexual dimorphism in wing coloration and is closely associated with oak woodlands throughout its range. It is listed as a species of special concern in Connecticut.
Hydroisotoma schaefferi
springtail
Hydroisotoma schaefferi is a springtail (Collembola) in the family Isotomidae, native to the eastern United States. The species inhabits very wet environments and is associated with moist microhabitats. First described by Krausbauer in 1898 under the name Isotoma schaefferi, it was later transferred to the genus Hydroisotoma. The species has also been recorded from Europe, the Mediterranean, and various regions of North America.
Hypagyrtis esther
Esther Moth
Hypagyrtis esther, commonly known as the Esther Moth, is a species of geometrid moth first described by William Barnes in 1928. The species exhibits a broad distribution across the eastern and central United States. Adults display extended flight periods with regional variation in timing. Larvae are specialized feeders on pine foliage.
Lucilia coeruleiviridis
Blue-green Bottle Fly, Green Bottle Fly
Lucilia coeruleiviridis is one of the most common and ubiquitous blow fly species in the southeastern United States, with a range extending throughout the eastern US. This species is forensically important, frequently used for minimum postmortem interval (mPMI) estimation in death investigations. Larval development is strongly temperature-dependent, with optimal growth occurring at warm temperatures. The species was first described by French entomologist Justin Pierre Marie Macquart in 1855 and was formerly placed in the genus Phaenecia.
Neotibicen pruinosus
scissor grinder, scissors grinder dog-day cicada
Neotibicen pruinosus, commonly known as the scissor grinder, is a species of cicada in the family Cicadidae. It is one of several North American cicadas known as "scissor grinders" due to its distinctive call resembling scissors being run over a grinding wheel. The species is primarily green with complex markings and an entirely black abdomen. A rare pale variant occurs in southeastern Kansas and eastern Oklahoma. The specific name pruinosus is Latin for "frosty," referring to the pruinose (powdery white) coating on the underside.
Neotibicen robinsonianus
Robinson's Annual Cicada, Robinson's cicada
Neotibicen robinsonianus, commonly known as Robinson's Annual Cicada, is a large-bodied annual cicada native to the Eastern United States. Males produce species-specific acoustic signals using tymbal organs located on the ventral abdomen. The species is active during late summer and early autumn, with observations and carcasses documented along woodland trails and prairie interfaces. It occurs sympatrically with other Neotibicen species such as N. lyricens, with which it can be found singing in the same habitats.
Phidippus cardinalis
cardinal jumper
Phidippus cardinalis is a jumping spider in the family Salticidae, commonly known as the cardinal jumper. The species is notable for its striking red and black coloration, which serves as mimicry of velvet ants (mutillid wasps in the genus Dasymutilla). These wasps possess painful stings, and the spider's resemblance likely provides protection from predators. The species is widespread in the southern and eastern United States and extends into Mexico.
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icationhaving-having-station-identificationhaving-having-standing-identificationhaving-having-status-identificationhaving-having-state-identificationhaving-having-condition-identificationhaving-having-quality-identificationhaving-having-property-identificationhaving-having-attribute-identificationhaving-having-characteristic-identificationhaving-having-feature-identificationhaving-having-trait-identificationhaving-having-marker-identificationhaving-having-indicator-identificationhaving-having-signal-identificationhaving-having-cue-identificationhaving-having-evidence-identificationhaving-having-proof-identificationhaving-having-support-identificationhaving-having-justification-identificationhaving-having-validation-identificationhaving-having-verification-identificationhaving-having-confirmation-identificationhaving-having-corroboration-identificationhaving-having-replication-identificationhaving-having-reproduction-identificationhaving-having-demonstration-identificationhaving-having-illustration-identificationhaving-having-example-identificationhaving-having-instance-identificationhaving-having-case-identificationhaving-having-specimen-identificationhaving-having-sample-identificationhaving-having-population-identificationhaving-having-community-identificationhaving-having-ecosystem-identificationhaving-having-landscape-identificationhaving-having-biome-identificationhaving-having-region-identificationhaving-having-zone-identificationhaving-having-area-identificationhaving-having-territory-identificationhaving-having-range-identificationhaving-having-realm-identificationhaving-having-domain-identificationhaving-having-sphere-identificationhaving-having-world-identificationhaving-having-universe-identificationhaving-having-context-identificationhaving-having-circumstance-identificationhaving-having-environment-identificationhaving-having-setting-identificationhaving-having-background-identificationhaving-having-backdrop-identificationhaving-having-stage-identificationhaving-having-scene-identificationhaving-having-scenario-identificationhaving-having-event-identificationhaving-having-incident-identificationhaving-having-episode-identificationhaving-having-experience-identificationhaving-having-phenomenon-identificationhaving-having-observation-identificationhaving-having-perception-identificationhaving-having-sensation-identificationhaving-having-impression-identificationhaving-having-conception-identificationhaving-having-cognition-identificationhaving-having-recognition-identificationhaving-having-awareness-identificationhaving-having-consciousness-identificationhaving-having-attention-identificationhaving-having-focus-identificationhaving-having-concentration-identificationhaving-having-engagement-identificationhaving-having-involvement-identificationhaving-having-participation-identificationhaving-having-interaction-identificationhaving-having-transaction-identificationhaving-having-exchange-identificationhaving-having-communication-identificationhaving-having-transmission-identificationhaving-having-transfer-identificationhaving-having-movement-identificationhaving-having-motion-identificationhaving-having-action-identificationhaving-having-activity-identificationhaving-having-operation-identificationhaving-having-functioning-identificationhaving-having-performance-identificationhaving-having-execution-identificationhaving-having-implementation-identificationhaving-having-realization-identificationhaving-having-actualization-identificationhaving-having-materialization-identificationhaving-having-manifestation-identificationhaving-having-expression-identificationhaving-having-representation-identificationhaving-having-presentation-identificationhaving-having-display-identificationhaving-having-show-identificationhaving-having-exhibition-identificationhaving-having-depiction-identificationhaving-having-portrayal-identificationhaving-having-rendering-identificationhaving-having-description-identificationhaving-having-account-identificationhaving-having-narrative-identificationhaving-having-story-identificationhaving-having-history-identificationhaving-having-record-identificationhaving-having-document-identificationhaving-having-archive-identificationhaving-having-repository-identificationhaving-having-store-identificationhaving-having-stock-identificationhaving-having-supply-identificationhaving-having-reserve-identificationhaving-having-resource-identificationhaving-having-asset-identificationhaving-having-capital-identificationhaving-having-wealth-identificationhaving-having-treasure-identificationhaving-having-prize-identificationhaving-having-reward-identificationhaving-having-return-identificationhaving-having-yield-identificationhaving-having-output-identificationhaving-having-product-identificationhaving-having-production-identificationhaving-having-creation-identificationhaving-having-generation-identificationhaving-having-origin-identificationhaving-having-source-identificationhaving-having-root-identificationhaving-having-basis-identificationhaving-having-foundation-identificationhaving-having-ground-identificationhaving-having-reason-identificationhaving-having-cause-identificationhaving-having-motive-identificationhaving-having-rationale-identificationhaving-having-explanation-identificationhaving-having-interpretation-identificationhaving-having-understanding-identificationhaving-having-comprehension-identificationhaving-having-grasp-identificationhaving-having-apprehension-identificationhaving-having-insight-identificationhaving-having-intuition-identificationhaving-having-wisdom-identificationhaving-having-knowledge-identificationhaving-having-information-identificationhaving-having-data-identificationhaving-having-fact-identificationhaving-having-truth-identificationhaving-having-reality-identificationhaving-having-actuality-identificationhaving-having-happening-identificationhaving-having-taking-place-identificationhaving-having-coming-about-identificationhaving-having-coming-to-pass-identificationhaving-having-transpiring-identificationhaving-having-unfolding-identificationhaving-having-developing-identificationhaving-having-evolving-identificationhaving-having-progressing-identificationhaving-having-advancing-identificationhaving-having-proceeding-identificationhaving-having-continuing-identificationhaving-having-persisting-identificationhaving-having-lasting-identificationhaving-having-enduring-identificationhaving-having-remaining-identificationhaving-having-staying-identificationhaving-having-abiding-identificationhaving-having-subsisting-identificationhaving-having-surviving-identificationhaving-having-living-identificationhaving-having-existing-identificationRenia nemoralis
Chocolate Renia Moth, Tardy Renia
Renia nemoralis is a litter moth in the family Erebidae, first described by Barnes and McDunnough in 1918. It is commonly known as the Chocolate Renia Moth or Tardy Renia. The species occurs across the eastern and central United States, with adults active in late season. Larvae are detritivores, feeding on dead leaves and other organic matter.
Stenacron pallidum
flatheaded mayfly
Stenacron pallidum is a species of flatheaded mayfly in the family Heptageniidae. It is found in the eastern United States. Like other members of the genus Stenacron, it is associated with freshwater stream habitats.
Taracticus octopunctatus
Eight-spotted Rainbow Robber
Taracticus octopunctatus is a species of robber fly in the family Asilidae. It is commonly known as the Eight-spotted Rainbow Robber. The species was first described by Thomas Say in 1823, originally placed in the genus Dioctria as Dioctria 8-punctata. It is found in the eastern United States.
Thermonectus nigrofasciatus
Mottled Diving Beetle
Thermonectus nigrofasciatus is a diving beetle species in the family Dytiscidae, native to the eastern United States. The species name refers to the distinctive black, postmedian transverse blotch on its elytra. It is commonly known as the Mottled Diving Beetle and has been documented in over 500 observations on iNaturalist.
Vasates aceriscrumena
maple spindle-gall mite
An eriophyid mite that induces distinctive fusiform (spindle-shaped) galls on maple leaves in the eastern United States. The microscopic mite is visible only through the galls it produces. Unlike the related maple bladder-gall mite, its galls are elongate rather than rounded. The species causes minimal harm to host trees despite the conspicuous galls.
Zimmermannia bosquella
American Chestnut Moth
Zimmermannia bosquella is a moth of the family Nepticulidae found in the eastern United States. It was formerly known as Nepticula bosquella and is now classified as conspecific with the American chestnut moth, which was once considered extinct. The species is associated with American chestnut.