Taxonomy
Lasius alienus
Distribution
Status
Conservation status
Not Assessed
Species Biology
Identification
- Small species (body length of workers 2-4mm)
- Head, thorax and abdomen dark brown or black in colour
- Easily confused with other Lasius species and the use of microscopic examination is usually required
Diet
This species primarily forages on aphid honeydew, both of those which occurs among trees and shrubs and those which occur underground.
Habitat
Poorly known in Ireland, but it appears to be associated with drier, more open habitats including dry river shingle, calcareous grassland and brownfield land.
Flight period
Males emerge during summer, typically between June-August. Workers are probably active throughout the spring, summer and possibly into early autumn.
Nesting biology
Nests are inconspicuous and usually constructed under stones and among soil.
Similar species
- Other black or brown ant species
Distribution
World distribution(GBIF)
Irish distribution
Seemingly very scarce in Ireland, with only a few records in the southern half of the island. Confusion with other species such as Lasius niger and particularly its sister species Lasius psammophilus have obscured its true extent here.
Temporal change
Records submitted to Data Centre in 2025
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