So far as I can recall, female butterflies find the larval food plants on which they lay their eggs by some combination of senses, including odor and "taste" (if you call it "tasting" with their feet). While moths find nocturnal nectar sources mainly by odor, I think butterflies locate their diurnal nectar sources mainly by sight -- again, if I recall things from the past correctly. I never was an entomologist, but as a kid I had intended to become one. Jim Shields in central Indiana (USA), where, after 30 to 50 years, the butterfly collection is still locked away in the basement. ************************************************* Jim Shields USDA Zone 5 Shields Gardens, Ltd. P.O. Box 92 WWW: http://www.shieldsgardens.com/ Westfield, Indiana 46074, USA Tel. ++1-317-867-3344 or toll-free 1-866-449-3344 in USA