The Patterson Park Audubon Center is offering an urban bird watching walk on Dec 21. It will run from 8 a.m. to 9:30 a.m. Over 180 bird species visit the park throughout the year. The park can lend visitors binoculars, but visitors must request such a loan in advance. The walks are free and no registration is required. To learn more, e-mail firstname.lastname@example.org or call (410) 558-2473.
The Maryland Sierra Club seeks volunteers to remove invasive plants from Magruder Park in Hyattsville on Dec 21. The hours are 9 a.m. to 1 p.m. Registration is required before 9 a.m. on Dec 21. For more information, contact Marc Imlay at email@example.com or (301) 442-5657 or Colleen Aistis at firstname.lastname@example.org or (301) 985-5057.
The Maryland Sierra Club seeks volunteers to remove invasive plants from Ruth B. Swann in Indian Head on Dec 21. The hours are 10 a.m. to 4 p.m. Participants will also learn plant identification. Volunteers should wear long sleeves and sturdy shoes and bring work gloves. Registration is required before 10 a.m. on Dec 21. For more information, contact Marc Imlay at email@example.com or (301) 283-0808.
Baltimore Free Store's next free market will be at the Madison Square Recreation Center on Dec 21. The market will accept donations from 10 a.m. to 11:30 a.m. and then give away goods from 12 p.m. to 2 p.m. To learn more, e-mail BmoreFree@gmail.com.
The Merkle Wildlife Sanctuary and Visitors' Center is holding a talk, "The Plight of Maryland's Bats," on Dec 21. The hours are 1 p.m. to 3 p.m. A park naturalist will describe native bats and the perils facing them, most notably white-nose syndrome. Visitors may also build a bat box. Each bat box costs $8.00. For more information, contact Karen Jarboe at firstname.lastname@example.org or (301) 888-1317.