Formica integroides
Sagehen Creek, California, USA

photograph © Alex Wild 2003

Thatch mound in Sagebrush. The Formica colonies that construct these large thatch mounds begin life as social parasites of other Formica colonies.

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 Nikon Coolpix 995.