NoMAA, National Audubon, GreenThumb Walking Tour: Bilingual (Eng/Esp) walking tour (2+ miles) spotlighting neighborhood bird murals & community gardens from 170th to 140th St., culminating w/ a lecture by dendrologist Carey Russell about NYC’s most common tree species (Eng only) at Winnie Said, 1624 Amsterdam Ave & 140th St. RSVP REQUIRED.