Crematogaster smithi
Arizona, USA

photograph © Alex Wild 2005

Some Crematogaster species have worker ants of more than one size.  Large workers, like the one pictured at center, appear capable of some amount of reproduction although the details of their behavior are poorly known.  Small workers do not reproduce.

USA AZ Cochise Co.: Southwestern Research Station, 7 km WSW Portal, 1650m 
31º53´N 109º12´W 

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.