Atta laevigata
Sao Paulo, Brazil

photograph © Alex Wild 2003

Atta leaf-cutting ants have an elaborate caste system, with extreme variation in worker size. 
Notice here the minor worker at the lower right, not even as long as the hind tarsi of the major worker at left.

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.