Maine Audubon's Nick Lund will help you see Portland's skyline in a new way, leading participants on a walking tour through the city's bird-safe architecture. More than a billion birds die each year in the US after striking glass windows, but conservationists and the building community are taking action to make buildings safer. Learn about the work Maine Audubon, PSA, the City of Portland, and building owners have been doing to make the streets safer for migrating birds. Approx. 2 mile, relaxed walk.