Formica aserva & Formica moki
McLaughlin U.C. Reserve, Lake Co., California, USA
Formica aserva, shown here on the right and far left, are slave-raiding ants. They conduct raids on the nests of other Formica species, bringing back pupae which later emerge and perform work in the raiders' colony. Nests nearly always are of mixed composition. In this case they have "enslaved" Formica moki.
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This image was captured with a Canon EOS D60, with a Canon 65/2.8 MPE 1-5x Macro lens.