In a message dated 1/27/01 5:05:51 AM Eastern Standard Time, [log in to unmask] writes: << Hi: A mathematical modeler contends that bee foraging flights can be modeled by diffusion theory. Comments? >> Over the years I have been impressed by the number of times I've seen selective pesticide damage. This suggests that a few hives are working in an orchard or field that has been sprayed, while other hives in the same bee yard are not. I am not scientific enough to put it in formulae, but I've always said that bees are "creatures of habit." If the scouts guide a particular hive to forage in one area, they will all tend to go that way, and will continue to do so. Other hives may go in other directions. That doesn't seem very random. There is a certain amount of intelligent guidance. Dave Green The Pollination Home Page: http://pollinator.com