In 2021 in five sessions, as of April 4, 2021, FODM volunteers have collected 136 bags of English ivy off trees, an effort to save the trees.
English ivy (Hedera helix L.) is an invasive, evergreen, aggressive invader that can outcompete and smother native plants, block sunlight needed by herbs and seedlings and spread into the forest canopy.
On February 17, 2021, 89 people became instant fans of the native southern flying squirrel (Glaucomys volans) thanks to a much-applauded Zoom presentation by naturalist Kim Young, from Fairfax County Park Authority’s Hidden Oaks Nature Center.
Ms. Young detailed the identifying characteristics, behavior, diet and habitat of these members of the rodent family, animals that weigh about the same as a cellphone, 2 ½ ounces, and are eight inches long, with their tail being from a third to a half of that length.
“Water is essential for all life,” explained Charles Smith, opening his talk on November 10, 2020, a presentation titled “Plants Shaped by Water.” No matter where plants are, they need water, from a little carnivorous sundew to wetland pickerelweed to giant oak trees. Some systems, like saltwater and freshwater wetlands, are defined by water. Smith is a branch chief with the Fairfax County Stormwater Planning Division, a certified ecological restoration practitioner and a Virginia master naturalist instructor.
The sora (Porzana Carolina) is the most abundant and widely distributed species of marsh-loving birds called rails (family Rallidae) in North America. In the 1960s, they were frequently seen in migration at Dyke Marsh, according to surveys conducted by Jackson Abbott.
Today, they are rarely encountered, so it was a rare treat when people heard at least five in the marsh in the early morning hours of October 18, 2020. “The sora makes its presence known with plaintive whistles and whinnies,” wrote Kenn Kaufman in Lives of North American Birds. This rail is mottled brown and gray with white-edged feathers, around eight to ten inches in length, two to four ounces in weight, has a bright yellow “candy corn” bill and nervously flicks its tail.
Since 2016, volunteers from FODM and the Audubon Society of Northern Virginia have conducted surveys of butterflies, dragonflies and damselflies in Dyke Marsh from April to October. Here are the total numbers of species documented from 2016 through September 23, 2020: butterflies, 50 species; damselflies, 12 species; dragonflies, 37 species. While surveying, they also document other insects.
