• “400 Friends and No One to Call: Breaking Through Isolation and Building Community,” 6 p.m. Author Val Walker talks about her book, inspired by her agonizing experience of feeling stranded and alone while recovering from major surgery. She’ll give how-to’s for befriending a wider community, building a social safety net, and fostering a sense of belonging – something she says it takes courage to do, even when there’s not a pandemic. Camden Public Library hosts the Zoom talk. For a link to join, email jpierce@librarycamden.org.


  • Talk on Coastal Acidification in Midcoast Maine, 4 to 6 p.m. Coastal Rivers hosts the online talk by Sarah Gladu and Kathleen Thornton on the latest data collected in waters close to the midcoast, where inputs from freshwater rivers and nutrient runoff from land change water chemistry. The presentation is free. Registration is required online at coastalrivers.org.


  • “Living on the Wind: The Miracle of Bird Migration,” a 10 a.m. talk on the Zoom platform with Scott Weidensaul, naturalist and author of more than two dozen books on natural history, including the Pulitzer Prize finalist “Living on the Wind.” Hosted by Georges River Land Trust and Mid-Coast Audubon. To register, email Annette@grlt.org with the subject line “Migration Talk” and you will receive the Zoom login information. Free.


  • “Integrating Medicinal Mushrooms into Your Life,” an online presentation on Thursday, June 4, at 6 p.m. hosted by Belfast Free Library. Maine mycologist and author Greg Marley gives the live program exploring common medicinal mushrooms with tips for integrating them into your diet and life. Several of the mushrooms are excellent edibles in their own right. The Zoom talk with be loaded with photographs and there will be time for questions at the end. To register, go to belfastlibrary.org/events or email bharrington@belfastlibrary.org.