All invited to join iNaturalist representative and MBGNA intern Austin Melancon for an introduction to this nature identification app and a walk to try out skills. Bring your smartphone with the free iNaturalist app installed. Dress for the weather. Arrival 15 minutes early recommended. 1–2 p.m., Matthaei lobby, 1800 N. Dixboro Rd. Free; metered parking. (734) 647–7600, mbgna.umich.edu/events.