One idea (http://science.jrank.org/pages/279/…) is that the Amaryllis family (daffodils, snowdrops) contain needle like crystals (raphides) as a defence against being eaten. I presume this explains why tulips in the garden are eaten and snowdrops left kicking around on the surface are untouched. One often sees the poisonous plants in a field of animals left untouched rather than lots of carrion - they're not stupid. -- David Pilling email: david@pilling.demon.co.uk web: http://www.davidpilling.net/ post: David Pilling P.O. Box 22 Thornton Cleveleys Blackpool. FY5 1LR UK fax: +44(0)870-0520-941