The black garden ant is a formicine ant, the type species of the subgenus ''Lasius'', found all over Europe and in some parts of North America and Asia. It is monogynous, meaning colonies have a single queen.
''Lasius niger'' colonies can reach in size up to around 15,000 workers but 4,000–7,000 is around average. A ''Lasius niger'' queen can live for around 12 years.
''Lasius niger'' is host to a number of temporary social parasites of the Lasius mixtus group including ''Lasius.. more