Formica - AntWiki

Genus/Species Identification. Prenolepis Imparis? Camponotus Castaneus? With photos. Severn, MD, US - The AntsCanada Ant Forum's

Formica rufa - AntWiki

A tentative key to workers in the Formica sanguinea species group · Natusfera

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Formica rufa - AntWiki

Formica - Wikipedia

Key to Nearctic species in the Formica rufa group - AntWiki

The Antbook

Formica polyctena (Ants of Germany) · iNaturalist

Formica comata - AntWiki

Key to New England Formica - AntWiki