Formica montana is an ant in the genus Formica (wood ants, mound ants, and field ants) in the family Formicidae. A common name for F. montana is "prairie mound ant". Phylogeny and classification of Hymenoptera, Sharkey M.J. 2007. Phylogenetic relationships among superfamilies of Hymenoptera, Sharkey M.J., Carpenter J.M., Vilhelmsen L., et al. 2012. Cladistics 28(1): 80-112.
F. montana are often polygynous, a single colony can have as many as 20 queens present.
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