PVAS Trip Leader: Shawn Walker This event is free and open to the public, however registration is requested. Please register below. Eligible for MN Recert hours Join Shawn Walker, local arborist and Certified Master Naturalist, for a winter tree-identification field trip at Eidolon Nature Preserve. This is a family-friendly event that will teach you how to identify trees by such factors as their shapes, branching habits, twigs, and bark. Eidolon Nature Preserve is located on Sidling Hill along Orleans Rd.…