Linepithema humile and Pogonomyrmex subdentatus
Davis, California, USA
Argentine ants, an aggressive pest species introduced by human commerce to California, attack a native harvester ant. Native ants in many places around the world have disappeared in areas invaded by Argentine ants.
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This image was captured with a Canon EOS D60, with a Canon 65/2.8 MPE 1-5x Macro lens.