Researchers measure aggression by holding a leather ball (on the end of a long pole) in front of the entrance and count the number of stings to it. Dick Marron *********************************************** The BEE-L mailing list is powered by L-Soft's renowned LISTSERV(R) list management software. For more information, go to: http://www.lsoft.com/LISTSERV-powered.html Guidelines for posting to BEE-L can be found at: http://honeybeeworld.com/bee-l/guidelines.htm