[2] 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.

[2] Lasius neglectus is believed to be prey for several animals and insects, specifically Clytra laeviuscula and some Picidae family birds.

[11] 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.

[12] Similar to many other invasive species, L. neglectus has so far only been found to infest disturbed urban habitats such as parks and gardens, where it eradicates most native ants and other insect populations while damaging trees because of the massive aphid cultures that it maintains.

Whereas most other known pest ants require warm temperatures to thrive, L. neglectus can survive winters with extended frost periods, so that further dispersal into temperate climatic zones seems unavoidable.