Formica integroides
Santa Cruz, California, USA

photograph © Alex Wild 2003

Formica integroides are aggressive when disturbed.  This worker ant has bent its gaster forward under its body to aim a stream of formic acid towards the intruding photographer.

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 100mm 2.8 Macro USM lens.