[{"data":1,"prerenderedAt":374},["ShallowReactive",2],{"species-sheet-\u002Fspecies\u002Flasius-alienus":3},{"species":4,"profile":236,"countryNames":273,"lookalikes":293,"similar":300,"comparisons":350,"posts":353},{"id":5,"authority":6,"colonyStructure":7,"confidence":8,"countries":11,"defense":31,"diet":34,"difficulty":37,"dryHumidity":38,"escapeRisk":9,"estimated":39,"experience":46,"extension":47,"finder":48,"founding":49,"growth":50,"guide":38,"hibernation":51,"hibernationMonths":52,"hibernationTemperature":55,"humidity":58,"image":61,"imageCredit":62,"imageHeight":66,"imageWidth":67,"interests":38,"keptSince":38,"legal":68,"lookalikes":71,"majorSize":38,"maxWorkers":77,"meta":78,"nests":79,"nuptialFlightMonths":83,"nuptialFlightTime":38,"nuptialFlightTriggers":38,"polymorphism":86,"queenSize":87,"regions":88,"relatedPosts":92,"reviewedAt":70,"scientificName":96,"sources":97,"stem":221,"subfamily":222,"temperature":223,"tribe":226,"workerSize":227,"__hash__":229,"slug":230,"genus":231,"nickname":232,"aliases":233,"tagline":235},"species\u002Fspecies\u002Flasius-alienus.yml","(Foerster, 1850)","monogyne",{"biology":9,"husbandry":10,"nuptialFlight":9},"medium","low",[12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30],"GB","FR","ES","AD","DE","AT","CZ","SK","SE","BG","GR","UA","TR","GE","RU","IR","KZ","KG","CN",[32,33],"bite","acid",[35,36],"sugar","insects",2,null,[40,41,42,43,44,45],"temperature","humidity","hibernationTemperature","workerSize","queenSize","maxWorkers","compiled","yml",false,"claustral","moderate","required",[53,54],10,3,[56,57],5,8,[59,60],50,60,"https:\u002F\u002Fcdn.brumaants.com\u002Fimages\u002Fspecies\u002Flasius-alienus\u002Flasius-alienus.jpg",{"author":63,"license":64,"url":65},"Philipp Hoenle (myrmecophil)","CC0 1.0","https:\u002F\u002Fwww.inaturalist.org\u002Fobservations\u002F164495534",800,1200,{"status":69,"checked":70},"free","2026-10-26",[72,73,74,75,76],"Lasius niger","Lasius paralienus","Lasius psammophilus","Lasius platythorax","Lasius neglectus",5000,{},[80,81,82],"sandwich","ytong","acrylic",[84,85],7,9,"monomorphic",[84,85],[89,90,91],"europe","middleEast","asia",[93,94,95],"how-to-care-for-lasius-niger","how-to-make-a-test-tube-setup-tutorial","how-to-hibernate-your-ants","Lasius alienus",[98,104,110,116,121,125,129,133,137,141,145,149,153,159,163,167,171,175,179,183,187,192,196,200,205,209,213,217],{"type":99,"title":100,"url":101,"covers":102},"reference","AntCat: Lasius alienus (Foerster, 1850), valid species, neotype from the Eifel, Germany","https:\u002F\u002Fantcat.org\u002Fcatalog\u002F438715",[103],"taxonomy",{"type":105,"title":106,"url":107,"covers":108},"paper","Seifert (2020), Soil Organisms 92: A taxonomic revision of the Palaearctic members of the subgenus Lasius s.str. (range from northern Iberia and southern England to the Bogda Shan, northern border at 53.3 degrees N in Central Europe, scape and hind tibia without or with very few standing hairs, L. niger with numerous standing hairs on all body parts)","https:\u002F\u002Fdoi.org\u002F10.25674\u002Fso92iss1pp15",[103,109],"distribution",{"type":105,"title":111,"url":112,"covers":113},"Seifert (1992), Abhandlungen und Berichte des Naturkundemuseums Görlitz 66: A taxonomic revision of the Palaearctic members of the ant subgenus Lasius s. str. (split into L. alienus, L. paralienus and L. psammophilus, habitats and soils of each, alates found from 9 July to 20 September, workers rarely bite, main host of Lasius jensi)","https:\u002F\u002Fbwars.com\u002Fsites\u002Fdefault\u002Ffiles\u002Fdiary_downloads\u002F2561_Seifert%20Lasius%201992.pdf",[103,114,109,115],"biology","nuptialFlight",{"type":117,"title":118,"url":119,"covers":120},"book","Collingwood (1979), Fauna Entomologica Scandinavica 8: The Formicidae (Hymenoptera) of Fennoscandia and Denmark, treatment of Lasius alienus in the broad sense used before 1992 (Plazi TreatmentBank)","https:\u002F\u002Ftreatment.plazi.org\u002Fid\u002F8DDA1C67539F5BDC475D1FA714E00D1B",[103,114,115],{"type":105,"title":122,"url":123,"covers":124},"Schär, Talavera, Rana, Espadaler, Cover, Shattuck and Vila (2022), Scientific Reports 12: Integrative taxonomy reveals cryptic diversity in North American Lasius ants, and an overlooked introduced species (L. alienus is Eurasian and not known from North America, the old North American alienus is L. americanus and part of L. ponderosae)","https:\u002F\u002Fdoi.org\u002F10.1038\u002Fs41598-022-10047-9",[103,109],{"type":105,"title":126,"url":127,"covers":128},"Schifani, Csősz, Viviano and Alicata (2021), Natural History Sciences 8: Ant diversity on the largest Mediterranean islands: on the presence or absence of 28 species in Sicily, treatment of Lasius alienus (Italian records doubtful, Plazi copy on Zenodo)","https:\u002F\u002Fzenodo.org\u002Frecords\u002F13373604",[103,109],{"type":99,"title":130,"url":131,"covers":132},"AntWiki: Lasius alienus (Seifert 2020 diagnosis, North American records moved to L. americanus, habitat and behavior notes by Wilson 1955 and Collingwood 1979)","https:\u002F\u002Fwww.antwiki.org\u002Fwiki\u002FLasius_alienus",[103,114,109],{"type":99,"title":134,"url":135,"covers":136},"BWARS: Lasius alienus (Bees, Wasps and Ants Recording Society; warm dry habitats such as chalk grassland, no erect hairs on scapes and tibiae, flight period July to September)","https:\u002F\u002Fbwars.com\u002Fant\u002Fformicidae\u002Fformicinae\u002Flasius-alienus",[114,109,115],{"type":99,"title":138,"url":139,"covers":140},"Catalogue of Life: Lasius alienus (Foerster, 1850) (AntCat classification: Formicinae, Lasiini)","https:\u002F\u002Fwww.catalogueoflife.org\u002Fdata\u002Ftaxon\u002F3SGW5",[103],{"type":99,"title":142,"url":143,"covers":144},"GBIF: Lasius alienus (Foerster, 1850), accepted name and vernacular names (the occurrence map still mixes in North American and pre-1992 records of other species)","https:\u002F\u002Fwww.gbif.org\u002Fspecies\u002F5035777",[103],{"type":99,"title":146,"url":147,"covers":148},"Wikipedia: Lasius alienus (sizes, North American populations now L. americanus, mutualism with the silver-studded blue butterfly)","https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FLasius_alienus",[103,114],{"type":99,"title":150,"url":151,"covers":152},"Wikipedia (German): Fremde Wegameise","https:\u002F\u002Fde.wikipedia.org\u002Fwiki\u002FFremde_Wegameise",[114,115],{"type":154,"title":155,"url":156,"covers":157},"careSheet","Ameisenhaltung.de: Artenverzeichnis, Lasius alienus","https:\u002F\u002Fwww.ameisenhaltung.de\u002Fartenverzeichnis\u002Fentry\u002F220-lasius-alienus\u002F",[158,114,115],"husbandry",{"type":99,"title":160,"url":161,"covers":162},"Ameisenhaltung.de: Schwarmflug table of swarming months","https:\u002F\u002Fwww.ameisenhaltung.de\u002Fschwarmflug\u002F",[115],{"type":154,"title":164,"url":165,"covers":166},"Ameisenforum.de: Artbeschreibung Lasius alienus (species profile with nests, food, winter rest and swarming time)","https:\u002F\u002Fwww.ameisenforum.de\u002Fviewtopic.php?t=38996",[158,114,115],{"type":154,"title":168,"url":169,"covers":170},"Antstore: Lasius alienus (nest 21 to 24 degrees C, winter rest at 5 to 8 degrees C from late October to late March)","https:\u002F\u002Fwww.antstore.net\u002Fshop\u002Fen\u002Fants\u002FAnts-from-Central-Europe\u002FLasius-alienus.html",[158],{"type":154,"title":172,"url":173,"covers":174},"Ants R Us: Lasius alienus queen with workers, foreign garden ant (care data and growth claims)","https:\u002F\u002Fwww.antsrus.com\u002Fproduct-page\u002Flasius-alienus-queen-with-workers",[158],{"type":154,"title":176,"url":177,"covers":178},"FormicaMarket: Lasius alienus care guide","https:\u002F\u002Fformicamarket.com\u002Fen\u002Fant-database\u002Flasius-alienus\u002F",[158],{"type":154,"title":180,"url":181,"covers":182},"Antkeeping.info: Lasius alienus","https:\u002F\u002Fantkeeping.info\u002Fants\u002Flasius-alienus\u002F",[158,115],{"type":154,"title":184,"url":185,"covers":186},"Ant Shack: Lasius alienus (partly mixed with the North American cornfield ant, moisture gradient advice)","https:\u002F\u002Fwww.ant-shack.com\u002Fpages\u002Fencyclopedia-entry\u002Flasius-alienus",[158],{"type":188,"title":189,"url":190,"covers":191},"forum","Ameisenforum.de: Haltungsbericht Lasius alienus, erste Kolonie (queen identified by size, shy and mostly nocturnal colony, winter rest in a fridge)","https:\u002F\u002Fwww.ameisenforum.de\u002Fviewtopic.php?t=56739",[158],{"type":188,"title":193,"url":194,"covers":195},"Ameisenforum.de: Lasius alienus, Winterruhe (keepers advise a winter rest like Lasius niger)","https:\u002F\u002Fwww.ameisenforum.de\u002Fviewtopic.php?t=54101",[158],{"type":188,"title":197,"url":198,"covers":199},"Ameisenforum.de: Bestimmung, Lasius alienus? (experienced members say the species cannot be identified from photos)","https:\u002F\u002Fwww.ameisenforum.de\u002Fviewtopic.php?t=43105",[103],{"type":99,"title":201,"url":202,"covers":203},"EU list of invasive alien species of Union concern (Implementing Regulation 2016\u002F1141, consolidated)","https:\u002F\u002Feur-lex.europa.eu\u002Feli\u002Freg_impl\u002F2016\u002F1141\u002Foj",[204],"legal",{"type":99,"title":206,"url":207,"covers":208},"Wikipedia: List of invasive alien species of Union concern (the listed ants are Brachyponera chinensis, Solenopsis geminata, invicta and richteri, and Wasmannia auropunctata, no Lasius)","https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FList_of_invasive_alien_species_of_Union_concern",[204],{"type":99,"title":210,"url":211,"covers":212},"Bundesartenschutzverordnung (BArtSchV), Anlage 1: protected species in Germany (only Formica among the ants)","https:\u002F\u002Fwww.gesetze-im-internet.de\u002Fbartschv_2005\u002Fanlage_1.html",[204],{"type":99,"title":214,"url":215,"covers":216},"MITECO: Spanish Catalogue of Invasive Alien Species, arthropods (only Lasius neglectus among the Lasius)","https:\u002F\u002Fwww.miteco.gob.es\u002Fes\u002Fbiodiversidad\u002Ftemas\u002Fconservacion-de-especies\u002Fespecies-exoticas-invasoras\u002Fce_eei_artropodos_nc.html",[204],{"type":99,"title":218,"url":219,"covers":220},"Japan Ministry of the Environment: designated invasive alien species under the Invasive Alien Species Act (no Lasius)","https:\u002F\u002Fwww.env.go.jp\u002Fnature\u002Fintro\u002F2outline\u002Flist.html",[204],"species\u002Flasius-alienus","Formicinae",[224,225],21,25,"Lasiini",[37,228],4,"2cV0Vd4k92re5F69VV1DnAjO-RKSdDlcT7Z0HH1qeLs","lasius-alienus","Lasius","",[234],"Cornfield ant","A small, shy brown Lasius of warm, dry grassland and limestone ground, easily mistaken for the black garden ant.",{"id":237,"title":238,"aliases":233,"body":239,"description":232,"extension":244,"faqs":245,"identification":255,"language":256,"meta":257,"navigation":258,"nickname":232,"notes":259,"path":270,"seo":271,"stem":221,"tagline":235,"__hash__":272},"speciesProfiles\u002Fspecies\u002Flasius-alienus.md","Lasius Alienus",{"type":240,"value":241,"toc":242},"minimark",[],{"title":232,"searchDepth":37,"depth":37,"links":243},[],"md",[246,249,252],{"question":247,"answer":248},"How can I tell Lasius alienus from Lasius niger?","Look at several workers under a strong lens. In Lasius alienus the antennal scapes and the hind tibiae have no standing hairs, or only a few near the base of the tibia, while Lasius niger has many standing hairs on all body parts. Lasius alienus workers are also a little smaller, with paler, yellowish-brown tibiae. Do not rely on a queen alone, because Lasius alienus queens normally have a few hairs on the scapes and hind tibiae.",{"question":250,"answer":251},"Is Lasius alienus the cornfield ant of North America?","No. For decades, small brown Lasius with few hairs in North America were called Lasius alienus, the cornfield ant. A 2018 study showed that they belong to a separate species, now Lasius americanus, and a 2022 study added that some of them are Lasius ponderosae. The real Lasius alienus is a Eurasian ant not known from North America, so American care sheets under this name describe a different ant.",{"question":253,"answer":254},"Where does Lasius alienus live?","In warm, dry, open places across temperate Europe and Asia, from northern Spain and southern England to northwestern China, and in Central Europe north to about 53 degrees N. Typical sites are dry grassland, bare rocky ground, orchards, sunny forest edges and open oak woods, and in one study about three quarters of 176 Central European nest sites lay on limestone or chalk. It is absent from Central European towns, where Lasius niger dominates, and on sandy ground Lasius psammophilus usually takes its place.","Small workers with a medium to dark brown body and paler, yellowish-brown antennae and lower legs; under a strong lens, the antennal scapes and the hind tibiae show no standing hairs or only a few, while Lasius niger and Lasius platythorax have many. Lasius paralienus, Lasius psammophilus and the invasive Lasius neglectus lack these hairs too, and telling them apart takes measurements of several workers under a microscope.","en",{},true,[260,263,266,268],{"kind":261,"text":262},"watchOut","Check the identification before you plan around it. Founding queens are easily mixed up with Lasius niger, and experienced forum members say this ant cannot be named from photos. Wait for normal-sized workers and look at several of them under a strong lens, since the tiny first workers carry fewer hairs. Until then, call the colony Lasius cf. alienus.",{"kind":264,"text":265},"tip","Care is much like Lasius niger: the claustral queen needs no food until her first workers hatch, then offer sugar water or honey and small insects such as fruit flies. In one German keeping report the workers carried small prey into the nest readily but visited the honey only now and then after the first weeks.",{"kind":264,"text":267},"Give it a warm, rather dry nest with one damp corner instead of a nest that is wet throughout. Wild nests sit in sunny, dry grassland and on rocky ground, and shops suggest about 21 to 24 °C in the nest part, with drier air in the outworld than in the nest.",{"kind":261,"text":269},"Expect a secretive colony. Ant faunas describe it as mainly subterranean and less conspicuous than Lasius niger, and a German keeper found their young colony active only at night and very shy. Cover the nest, check it rarely and keep the escape barrier thick, since one tiny worker got surprisingly far over a thinly coated patch of talc.","\u002Fspecies\u002Flasius-alienus",{"description":232},"KYiVeRe5AY4FKsiW7DUrCLUGZ8ODgmCz1qelkEqS_OI",[274,275,276,277,278,279,280,281,282,283,284,285,286,287,288,289,290,291,292],"Andorra","Austria","Bulgaria","China","Czechia","France","Georgia","Germany","Greece","Iran","Kazakhstan","Kyrgyzstan","Russia","Slovakia","Spain","Sweden","Türkiye","Ukraine","United Kingdom",[294,296,297,298,299],{"name":72,"slug":295},"lasius-niger",{"name":73,"slug":38},{"name":74,"slug":38},{"name":75,"slug":38},{"name":76,"slug":38},[301,318,334],{"slug":302,"scientificName":303,"genus":231,"nickname":304,"aliases":305,"tagline":307,"image":308,"experience":46,"guide":38,"difficulty":37,"workerSize":309,"majorSize":38,"queenSize":310,"temperature":311,"hibernation":51,"hibernationTemperature":313,"hibernationBand":314,"sizeClass":9,"founding":49,"colonyStructure":315,"regions":316},"lasius-flavus","Lasius flavus","Yellow meadow ant",[306],"Yellow hill ant","A shy, golden-yellow soil dweller that herds root aphids and raises grassy mounds in old meadows.","https:\u002F\u002Fcdn.brumaants.com\u002Fimages\u002Fspecies\u002Flasius-flavus\u002Flasius-flavus.jpg",[37,56],[84,85],[312,225],20,[56,57],"cold","facultative",[89,317,90,91],"northAfrica",{"slug":319,"scientificName":320,"genus":231,"nickname":232,"aliases":321,"tagline":324,"image":325,"experience":326,"guide":327,"difficulty":54,"workerSize":328,"majorSize":38,"queenSize":329,"temperature":330,"hibernation":51,"hibernationTemperature":332,"hibernationBand":314,"sizeClass":9,"founding":49,"colonyStructure":7,"regions":333},"lasius-emarginatus","Lasius emarginatus",[322,323],"ManhattAnt","Central European bicolored ant","A small, fast-growing Lasius with a reddish thorax that loves to dig tunnels.","https:\u002F\u002Fcdn.brumaants.com\u002Fimages\u002Fspecies\u002Flasius-emarginatus\u002Flasius_emarginatus_inside_test_tube_6.jpeg","firstHand","how-to-care-for-lasius-emarginatus",[54,56],[84,85],[224,331],27,[56,57],[89],{"slug":295,"scientificName":72,"genus":231,"nickname":335,"aliases":336,"tagline":340,"image":341,"experience":326,"guide":93,"difficulty":37,"workerSize":342,"majorSize":38,"queenSize":343,"temperature":344,"hibernation":51,"hibernationTemperature":346,"hibernationBand":348,"sizeClass":9,"founding":49,"colonyStructure":7,"regions":349},"Black garden ant",[337,338,339],"Common black ant","Common black garden ant","Small black ant","Adaptable, undemanding and found in almost every garden: the classic first colony.","https:\u002F\u002Fcdn.brumaants.com\u002Fimages\u002Fspecies\u002Flasius-niger\u002FLasius_niger_colony_in_test_tube_2.jpeg",[54,56],[57,85],[345,225],23,[57,347],12,"cool",[89,91],[351],{"pair":352,"name":72},"lasius-alienus-vs-lasius-niger",[354,361,368],{"id":355,"title":356,"description":357,"image":358,"categoryText":359,"path":360},"blog\u002Fhow-to-care-for-lasius-niger.md","How To Care for Lasius niger","In this guide, you will learn how to care for Lasius niger! Temperature, humidity, food, hibernation, nest type... and much more!","https:\u002F\u002Fcdn.brumaants.com\u002Fimages\u002Fbruma_ants_thumbnail_lasius_niger_care_guide.png","Care Guides","\u002Fhow-to-care-for-lasius-niger",{"id":362,"title":363,"description":364,"image":365,"categoryText":366,"path":367},"blog\u002Fhow-to-make-a-test-tube-setup-tutorial.md","How To Make a Test Tube Setup - Ant Keeping Basics","In this tutorial you will learn how to make a test tube setup, the best way to create the optimal environment for a newly mated queen ant!","https:\u002F\u002Fcdn.brumaants.com\u002Fimages\u002Fbruma_ants_thumbnail_test_tube_setup_tutorial_new.png","Ant Keeping Basics","\u002Fhow-to-make-a-test-tube-setup-tutorial",{"id":369,"title":370,"description":371,"image":372,"categoryText":366,"path":373},"blog\u002Fhow-to-hibernate-your-ants.md","How To Hibernate Your Ants - Hibernation Tutorial","In this guide, we’re going to talk about hibernation: What is it? Why do ants need hibernation? Should I hibernate my ants? Let's see!","https:\u002F\u002Fcdn.brumaants.com\u002Fimages\u002Fbruma_ants_thumbnail_hibernation_guide.png","\u002Fhow-to-hibernate-your-ants",1793205494162]