The Library Naturalist will teach us about little-known lichens, those scaly green scabs that grow on tree branches, trunks, and rocks.  Learn what a lichen is, where they live, why they are important, what they can tell us about our environment, and how to identify types of lichens.  This program may not be accessible to all.  Sturdy footwear and a jacket recommended.  All patrons must sign a waiver prior to participating.