Lasius neglectus Van Loon, Boomsma & Andrásfalvy, 1990

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English Invasive garden ant Status LU: absent.
Lëtzebuergesch Vergiesse Weeseechomes Status Eur.: established.
Français n/a RA: ISEIA: C0. Harmonia+: n/a.
Deutsch Vergessene Wegameise Wikipedia: Wikipedia - English - Invasive garden ant Wikipedia - Français - Lasius neglectus Nederlands | Wikispecies: Wikispecies - Lasius neglectus | CABI
Nederlands n/a Back to the list of invertebrates

Brief description

Lasius neglectus casent0173143 profile 1Lasius neglectus Van Loon, Boomsma & Andrásfalvy, 1990 is a polygynous, sometimes invasive, ant of the genus Lasius. The ant was identified in 1990 after establishing a colony in Budapest, Hungary. Superficially, they are similar in appearance to the common black garden ant, Lasius niger, but have significantly different behavioural patterns, particularly in the social structure within colonies. Lasius neglectus is believed to be prey for several animals and insects, specifically Clytra laeviuscula and some Picidae family birds.

Lasius neglectus can outnumber native European varieties of ant by 10 to 100 times in infested gardens and, as such, has been considered a pest in many central European countries. The species has spread as far as Jena in Germany, Ghent in Belgium and Warsaw in Poland. A colony has been reported in Hidcote Bartrim, Gloucestershire in England, where it demonstrates an affinity for outdoor electrical fittings where it may constitute a fire risk (Wikipedia contributors 2020).

Status and distribution in Luxembourg

Lasius neglectus Van Loon, Boomsma & Andrásfalvy, 1990 hasn’t been observed in Luxembourg so far (MNHNL, iNaturalist & GBIF 2020).

Risk assessment

ISEIA protocol

C0 (3+1+1+1) (Ries et al. 2017: 68).

Harmonia+ protocol

Not assessed yet.

Worldwide distribution


  • CABI, 2019. Lasius neglectus Van Loon, Boomsma & Andrásfalvy, 1990. In: Invasive Species Compendium. Wallingford, UK: CAB International. URL: [accessed 2020-04-09]
  • MNHNL, iNaturalist & GBIF, 2020. Lasius neglectus Van Loon, Boomsma & Andrásfalvy, 1990 in MNHNL-mdata, online portal combining species observation from Recorder-Lux, iNaturalist and GBIF. National Museum of Natural History, Luxembourg. URL: [accessed 2020-04-09]
  • Ries, C., A. Arendt, C. Braunert, S. Christian, A. Dohet, A. Frantz, G. Geimer, M. Hellers, J. A. Massard, X. Mestdagh, R. Proess, N. Schneider & M. Pfeiffenschneider, 2017. Environmental impact assessment and black, watch and alert list classification after the ISEIA Protocol of invertebrates in Luxembourg. Bull. Soc. Nat. luxemb. 119: 63-70. [PDF 360 KB]
  • Wikipedia contributors, 2020. Lasius neglectus, Wikipedia, The Free Encyclopedia, 14 January 2020, 03:19 UTC, [accessed 2020-04-09]

 Page content last updated on 2020-04-09.