Formica densiventris
Truckee, California, USA

photograph © Alex Wild 2004

Ants in the Formica microgyna species-group such as this F. densiventris worker are distinguishable from ants of the very similar F. rufa species-group by the shape of the hairs on the mesosomal dorsum.  In microgyna group ants, these hairs are short and thick, often increasing in width towards the tip.

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.