Most "acorn ant" species are less choosy about nesting site than their name suggests. This colony set itself up in a narrow crevice between two flat stones. Visible here are all components of a mature ant colony: queens, workers, a single male, and brood in varying stages of development. South Bristol, New York, USA.
Portrait of the acorn ant, Temnothorax longispinosus. South Bristol, New York, USA
South Bristol, New York, USA