A hat-tip to my former student Matt Wolodko, who directed me to this interesting article about whether ants are able to count.
Reactions and commentary can be found in the links below.
http://inspiringscience.wordpress.com/2012/11/09/do-ants-really-count-their-steps/
http://www.npr.org/blogs/krulwich/2011/06/01/120587095/ants-that-count
http://www.livescience.com/871-ants-marching-count-steps.html
http://www.newscientist.com/article/dn9436-ants-use-pedometers-to-find-home.html#.UfAfsdhk31E