
Appearance
''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 mixtus'' and ''Lasius umbratus''.
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