Members of the Sierra Club-Lancaster Group invite the public to join them for a free Zoom presentation at 7 p.m. Wednesday, April 21, that will focus on the importance of making backyards environmentally friendly to wildlife. The speaker will be Linda Ferich, a Pennsylvania Master Naturalist and certified Chesapeake Bay Landscape Professional. Her talk will be based on the Community Wildlife Habitat Initiative of the Lancaster Conservancy (LC), a partnership with the National Wildlife Federation, that she launched in 2017.…