> As for coloration and latitude/altitude changes, might try Alpatov for > some reading, or even old Bergmann and his famous Rule! I'm not familiar with thes people, and I doubt their work is easy for me to find. Could you kindly outline where/when each wrote, whether their work has been corroborated by later writers, and, in a nutshell, what they found? Thanks. allen -- Visit www.honeybeeworld.com/bee-l for rules, FAQ and other info ---