[{"data":1,"prerenderedAt":372},["ShallowReactive",2],{"species-sheet-\u002Ffr\u002Fspecies\u002Flasius-alienus":3},{"species":4,"profile":235,"countryNames":273,"lookalikes":293,"similar":300,"comparisons":348,"posts":351},{"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":234},"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","",[],"Un petit Lasius brun et timide des prairies chaudes et sèches et des sols calcaires, facile à confondre avec la fourmi noire des jardins.",{"id":236,"title":237,"aliases":233,"body":238,"description":232,"extension":243,"faqs":244,"identification":254,"language":255,"meta":256,"navigation":257,"nickname":232,"notes":258,"path":269,"seo":270,"stem":271,"tagline":234,"__hash__":272},"speciesProfiles\u002Ffr\u002Fspecies\u002Flasius-alienus.md","Lasius Alienus",{"type":239,"value":240,"toc":241},"minimark",[],{"title":232,"searchDepth":37,"depth":37,"links":242},[],"md",[245,248,251],{"question":246,"answer":247},"Comment distinguer Lasius alienus de Lasius niger ?","Observez plusieurs ouvrières sous une forte loupe. Chez Lasius alienus, les scapes antennaires et les tibias postérieurs n'ont aucun poil dressé, ou seulement quelques-uns près de la base du tibia, alors que Lasius niger a beaucoup de poils dressés sur toutes les parties du corps. Les ouvrières de Lasius alienus sont aussi un peu plus petites, avec des tibias plus pâles, d'un brun jaunâtre. Ne vous fiez pas à une reine seule, car les reines de Lasius alienus ont normalement quelques poils sur les scapes et les tibias postérieurs.",{"question":249,"answer":250},"Lasius alienus est-elle la « cornfield ant » d'Amérique du Nord ?","Non. Pendant des décennies, les petits Lasius bruns peu poilus d'Amérique du Nord ont été appelés Lasius alienus, la « cornfield ant ». Une étude de 2018 a montré qu'ils appartiennent à une espèce distincte, aujourd'hui Lasius americanus, et une étude de 2022 a ajouté que certains d'entre eux sont Lasius ponderosae. La vraie Lasius alienus est une fourmi eurasiatique qui n'est pas connue d'Amérique du Nord : les fiches de soins américaines sous ce nom décrivent donc une autre fourmi.",{"question":252,"answer":253},"Où vit Lasius alienus ?","Dans des lieux chauds, secs et ouverts à travers l'Europe tempérée et l'Asie, du nord de l'Espagne et du sud de l'Angleterre jusqu'au nord-ouest de la Chine, et en Europe centrale jusqu'à environ 53 degrés de latitude nord. Les sites typiques sont les prairies sèches, les sols rocheux nus, les vergers, les lisières ensoleillées de forêt et les chênaies claires, et, dans une étude, environ les trois quarts de 176 sites de nidification d'Europe centrale se trouvaient sur du calcaire ou de la craie. Elle est absente des villes d'Europe centrale, où Lasius niger domine, et sur les sols sableux Lasius psammophilus prend généralement sa place.","De petites ouvrières au corps brun moyen à foncé, aux antennes et au bas des pattes plus pâles, d'un brun jaunâtre ; sous une forte loupe, les scapes antennaires et les tibias postérieurs n'ont aucun poil dressé ou seulement quelques-uns, alors que Lasius niger et Lasius platythorax en ont beaucoup. Lasius paralienus, Lasius psammophilus et l'espèce invasive Lasius neglectus sont elles aussi dépourvues de ces poils, et les distinguer exige de mesurer plusieurs ouvrières au microscope.","fr",{},true,[259,262,265,267],{"kind":260,"text":261},"watchOut","Vérifiez l'identification avant de vous organiser en conséquence. Les reines fondatrices se confondent facilement avec Lasius niger, et des membres expérimentés de forums disent qu'on ne peut pas identifier cette fourmi d'après des photos. Attendez des ouvrières de taille normale et observez-en plusieurs sous une forte loupe, car les toutes petites premières ouvrières portent moins de poils. D'ici là, appelez la colonie Lasius cf. alienus.",{"kind":263,"text":264},"tip","Les soins ressemblent beaucoup à ceux de Lasius niger : la reine claustrale n'a besoin d'aucune nourriture jusqu'à la naissance de ses premières ouvrières ; ensuite, proposez de l'eau sucrée ou du miel et de petits insectes comme des mouches des fruits. Dans un compte rendu d'élevage allemand, les ouvrières rapportaient volontiers de petites proies au nid, mais ne visitaient le miel que de temps en temps après les premières semaines.",{"kind":263,"text":266},"Donnez-lui un nid chaud et plutôt sec avec un coin humide, au lieu d'un nid mouillé de bout en bout. Dans la nature, les nids se trouvent dans des prairies sèches et ensoleillées et sur des sols rocheux, et les boutiques conseillent environ 21 à 24 °C dans la partie nid, avec un air plus sec dans l'aire de chasse que dans le nid.",{"kind":260,"text":268},"Attendez-vous à une colonie discrète. Les ouvrages faunistiques sur les fourmis la décrivent comme surtout souterraine et moins visible que Lasius niger, et un éleveur allemand a constaté que sa jeune colonie n'était active que la nuit et très craintive. Couvrez le nid, vérifiez-le rarement et appliquez la barrière anti-évasion en couche épaisse, car une minuscule ouvrière est allée étonnamment loin sur une plage de talc appliquée en couche fine.","\u002Ffr\u002Fspecies\u002Flasius-alienus",{"description":232},"fr\u002Fspecies\u002Flasius-alienus","5vPfyq5df_ckA33K-nbLUZjdq97OGMQ3kogj_G9J5eo",[274,275,276,277,278,279,280,281,282,283,284,285,286,287,288,289,290,291,292],"Allemagne","Andorre","Autriche","Bulgarie","Chine","Espagne","France","Géorgie","Grèce","Iran","Kazakhstan","Kirghizstan","Royaume-Uni","Russie","Slovaquie","Suède","Tchéquie","Turquie","Ukraine",[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","Fourmi jaune des prairies",[306],"Fourmi jaune","Une habitante timide et dorée du sol, qui élève des pucerons des racines et bâtit des monticules herbeux dans les vieilles prairies.","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","Fourmi échancrée","Un petit Lasius à croissance rapide, au thorax rougeâtre, qui adore creuser des 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":338,"image":339,"experience":326,"guide":93,"difficulty":37,"workerSize":340,"majorSize":38,"queenSize":341,"temperature":342,"hibernation":51,"hibernationTemperature":344,"hibernationBand":346,"sizeClass":9,"founding":49,"colonyStructure":7,"regions":347},"Fourmi noire des jardins",[337],"Fourmi noire","Adaptable, peu exigeante et présente dans presque tous les jardins : la première colonie classique.","https:\u002F\u002Fcdn.brumaants.com\u002Fimages\u002Fspecies\u002Flasius-niger\u002FLasius_niger_colony_in_test_tube_2.jpeg",[54,56],[57,85],[343,225],23,[57,345],12,"cool",[89,91],[349],{"pair":350,"name":72},"lasius-alienus-vs-lasius-niger",[352,359,366],{"id":353,"title":354,"description":355,"image":356,"categoryText":357,"path":358},"blog\u002Ffr\u002Fhow-to-care-for-lasius-niger.md","Comment prendre soin de Lasius niger","Dans ce guide, vous apprendrez à prendre soin de Lasius niger ! Température, humidité, nourriture, hivernation, type de nid... et bien plus encore !","https:\u002F\u002Fcdn.brumaants.com\u002Fimages\u002Fbruma_ants_thumbnail_lasius_niger_care_guide.png","Guides de soins","\u002Ffr\u002Fhow-to-care-for-lasius-niger",{"id":360,"title":361,"description":362,"image":363,"categoryText":364,"path":365},"blog\u002Ffr\u002Fhow-to-make-a-test-tube-setup-tutorial.md","Comment préparer une installation en tube à essai - Bases","Dans ce tutoriel, apprenez à préparer une installation en tube à essai, la meilleure façon d'offrir un environnement idéal à une reine fraîchement fécondée !","https:\u002F\u002Fcdn.brumaants.com\u002Fimages\u002Fbruma_ants_thumbnail_test_tube_setup_tutorial_new.png","Bases","\u002Ffr\u002Fhow-to-make-a-test-tube-setup-tutorial",{"id":367,"title":368,"description":369,"image":370,"categoryText":364,"path":371},"blog\u002Ffr\u002Fhow-to-hibernate-your-ants.md","Comment faire hiverner vos fourmis - Tutoriel d'hivernation","Dans ce guide, parlons de l'hivernation : qu'est-ce que c'est ? Pourquoi les fourmis en ont-elles besoin ? Dois-je faire hiverner mes fourmis ? Voyons ça !","https:\u002F\u002Fcdn.brumaants.com\u002Fimages\u002Fbruma_ants_thumbnail_hibernation_guide.png","\u002Ffr\u002Fhow-to-hibernate-your-ants",1793205521002]