Polyergus breviceps and Formica argentea
Truckee, California, USA

photograph © Alex Wild 2004

Socially parasitic ants exist in mixed colonies of parasite and host.  This dulotic nest belongs to a red slave-raiding Polyergus species which is parasitic on the silvery field ant Formica argentea.

This image is copyrighted by the photographer and cannot be used without permission. To obtain permission to use this image, please email Alex Wild. (alwild (at)  Most of the photographs on are reduced from their original size and compressed for more efficient web transmission.  In some cases, higher quality versions are available.

This image was captured with a Canon EOS D60, with a Canon 65/2.8 MPE 1-5x Macro lens.