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All 100 bugs, A to Z

Every bug in our field guide. Type to filter by name, or use the identifier to search by traits.

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American CockroachPeriplaneta americana35–53 mmNuisance American Dog TickDermacentor variabilis3–5 mmHealth risk AphidAphidoidea superfamily1–3 mmNuisance Argentine AntLinepithema humile2–3 mmNuisance Arizona Bark ScorpionCentruroides sculpturatus50–80 mmHealth risk Asian Lady BeetleHarmonia axyridis5–8 mmNuisance Bald-Faced HornetDolichovespula maculata15–20 mmHealth risk Bed BugCimex lectularius4–7 mmCan bite or sting Black Widow SpiderLatrodectus mactans3–13 mmHealth risk Blacklegged TickIxodes scapularis1–5 mmHealth risk Blister BeetleEpicauta spp.8–25 mmCan bite or sting Blow FlyLucilia sericata8–12 mmNuisance Bold Jumping SpiderPhidippus audax6–15 mmHarmless BooklouseLiposcelis spp.1–2 mmHarmless Boxelder BugBoisea trivittata11–14 mmNuisance Brown Marmorated Stink BugHalyomorpha halys12–17 mmNuisance Brown Recluse SpiderLoxosceles reclusa6–20 mmHealth risk Brown-Banded CockroachSupella longipalpa10–14 mmNuisance Bumble BeeBombus spp.10–25 mmCan bite or sting Cabbage WhitePieris rapae32–47 mmNuisance Camel CricketDiestrammena asynamora13–19 mmHarmless Carpenter AntCamponotus pennsylvanicus6–13 mmNuisance Carpenter BeeXylocopa virginica18–25 mmNuisance Cat FleaCtenocephalides felis1–3 mmCan bite or sting Cellar SpiderPholcus phalangioides7–10 mmHarmless ChiggerTrombiculidae family0.2–0.4 mmCan bite or sting Cicada KillerSphecius speciosus30–50 mmNuisance Cigarette BeetleLasioderma serricorne2–3 mmNuisance Clover MiteBryobia praetiosa0.7–0.9 mmNuisance Colorado Potato BeetleLeptinotarsa decemlineata9–11 mmNuisance Common Green DarnerAnax junius68–80 mmHarmless Common House SpiderParasteatoda tepidariorum4–8 mmHarmless Confused Flour BeetleTribolium confusum3–4 mmNuisance Crane FlyTipula spp.10–35 mmHarmless Differential GrasshopperMelanoplus differentialis28–50 mmNuisance Drain FlyClogmia albipunctata2–5 mmNuisance Drugstore BeetleStegobium paniceum2–3.5 mmNuisance Drywood TermiteIncisitermes minor8–12 mmNuisance EarwigForficula auricularia12–20 mmNuisance Eastern Subterranean TermiteReticulitermes flavipes3–10 mmNuisance Emerald Ash BorerAgrilus planipennis8–14 mmNuisance European HornetVespa crabro25–35 mmHealth risk Eyed Click BeetleAlaus oculatus25–45 mmHarmless FireflyPhotinus pyralis10–14 mmHarmless Fruit FlyDrosophila melanogaster2–4 mmNuisance Fungus GnatBradysia spp.2–4 mmNuisance German CockroachBlattella germanica12–15 mmNuisance Goldenrod Crab SpiderMisumena vatia3–10 mmHarmless Green LacewingChrysoperla carnea12–20 mmHarmless Ground BeetleCarabidae family5–30 mmHarmless HarvestmanOpiliones order2–7 mmHarmless Head LousePediculus humanus capitis2–3 mmCan bite or sting Hobo SpiderEratigena agrestis7–14 mmNuisance Honey BeeApis mellifera12–15 mmCan bite or sting Horse FlyTabanus spp.10–30 mmCan bite or sting House CentipedeScutigera coleoptrata25–35 mmNuisance House CricketAcheta domesticus16–21 mmHarmless House FlyMusca domestica6–7 mmNuisance Indian Meal MothPlodia interpunctella8–10 mmNuisance Japanese BeetlePopillia japonica10–15 mmNuisance June BugPhyllophaga spp.12–25 mmNuisance Kissing BugTriatoma sanguisuga15–25 mmHealth risk Larder BeetleDermestes lardarius7–9 mmNuisance Large Milkweed BugOncopeltus fasciatus10–18 mmHarmless Little Black AntMonomorium minimum1.5–2 mmNuisance Lone Star TickAmblyomma americanum3–6 mmHealth risk Longhorn Crazy AntParatrechina longicornis2.3–3 mmNuisance Luna MothActias luna80–115 mmHarmless MillipedeOxidus gracilis20–40 mmNuisance Monarch ButterflyDanaus plexippus90–105 mmHarmless MosquitoCulicidae (e.g. Aedes albopictus)3–6 mmHealth risk Mud DauberSceliphron caementarium25–28 mmHarmless Odorous House AntTapinoma sessile2–3 mmNuisance Oriental CockroachBlatta orientalis25–30 mmNuisance Paper WaspPolistes spp.16–25 mmCan bite or sting Pavement AntTetramorium immigrans2.5–4 mmNuisance Periodical CicadaMagicicada septendecim25–33 mmHarmless Pharaoh AntMonomorium pharaonis1.5–2 mmNuisance Pill BugArmadillidium vulgare8–14 mmHarmless Praying MantisTenodera sinensis75–110 mmHarmless Red Imported Fire AntSolenopsis invicta2–6 mmHealth risk Rice WeevilSitophilus oryzae2–3 mmNuisance Seven-Spotted LadybugCoccinella septempunctata5–8 mmHarmless SilverfishLepisma saccharina12–19 mmNuisance Smokybrown CockroachPeriplaneta fuliginosa30–38 mmNuisance Southern House SpiderKukulcania hibernalis10–19 mmNuisance Spongy MothLymantria dispar35–65 mmNuisance Spotted LanternflyLycorma delicatula20–25 mmNuisance Spotted OrbweaverNeoscona crucifera7–15 mmHarmless SpringtailCollembola class1–2 mmHarmless Squash BugAnasa tristis14–16 mmNuisance Tomato HornwormManduca quinquemaculata75–100 mmNuisance Varied Carpet BeetleAnthrenus verbasci2–3.5 mmNuisance Velvet AntDasymutilla occidentalis15–25 mmCan bite or sting Webbing Clothes MothTineola bisselliella6–8 mmNuisance Western Conifer Seed BugLeptoglossus occidentalis16–20 mmNuisance Wheel BugArilus cristatus25–38 mmCan bite or sting Wolf SpiderLycosidae family10–35 mmCan bite or sting Yellow Garden SpiderArgiope aurantia5–28 mmHarmless YellowjacketVespula maculifrons10–16 mmHealth risk