The Virginia General Assembly passed a resolution recognizing the work of the Friends of Dyke Marsh, FODM's 40th anniversary and the 100th anniversary of the national parks system in 2016. The bill's patrons were Senators Scott Surovell and Adam Ebbin and Delegates Paul Krizek and Mark Sickles.
Spring is breeding time in Dyke Marsh for many species of wildlife, including skinks. The American five-lined skink, (Plestiodon fasciatus), is one of the most commonly seen lizards in eastern North America and is frequently observed around logs along the Haul Road Trail (photo, skinks mating May 2016 by Ed Eder).
At the quarterly meeting of FODMers and friends on May 11, 2016, Alan Ford and Laura Beaty gave a presentation on the interrelationships of plants and animals and the important role of pollinators and leaf-eaters. Alan is president of the Potowmack Chapter of the Virginia Native Plant Society and Laura chairs the Propagation Committee.
Every spring, FODMers welcome the spring return of the ospreys (Pandion haliaetus) to Dyke Marsh and the Potomac River shoreline where these magnificent raptors build and refurbish their nests and raise their young. In recent years, there have been approximately 10 to 12 active osprey nests within FODM’s breeding bird survey tract, a three-mile area that extends from the Porto Vecchio condominiums near Hunting Creek to south of Morningside Lane.
Despite the rebound in the osprey population, threats still exist. On April 18, 2016, FODMer Eldon Boes, a Porto Vecchio resident, reported that the female osprey using the nesting platform on condo property had died after she entangled her primary flight feathers in fishing line. Eldon removed the fishing line from the nest.
On the morning of April 29, 2016, 24 students and three teachers from Alexandria’s T.C. Williams High School’s International Academy visited Dyke Marsh to observe in action some of the lessons of their biology class and to try their hand at suppression of invasive plants.
Volunteers began lepidoptera and odonata surveys in Dyke Marsh on April 20, 2016, led by Jim Waggener. On the 20th, surveyors identified five butterfly species in a brief span. The peak time for surveys is May through September. This work helps identify and save critical habitat that preserves biodiversity in our region.
Under a steady drizzle, a steady stream of raptor fans attended the annual Raptor Rapture in Belle Haven Park on April 23, 2016, sponsored by FODM, the Raptor Conservancy of Virginia and the National Park Service.
Kent Knowles (pictured) and Gabby Hrycyshyn of the Conservancy brought an Eastern screech owl (gray morph), an American kestrel, peregrine falcon (photo), red-tailed hawk, barn owl and Harris’s hawk. These birds cannot live on their own in the wild.
As the weather warms, birds are busy breeding in the Dyke Marsh Wildlife Preserve. In April, FODMers observed red-bellied woodpeckers and northern flickers investigating potential nest cavities, despite facing stiff competition from European starlings. Observers have seen Carolina chickadees and fish crows carrying nesting material in the Belle Haven picnic area and along the Haul Road.
On April 16, 2016, 66 enthusiastic volunteers of all ages turned out on a beautiful spring day and collected trash along the Potomac River and Dyke Marsh shoreline. The group found plastic bottles, aluminum cans, fast food boxes and wrappers, plastic bags, pieces of Styrofoam, at least two tires and more – too much.
With the assistance of Dan Schwartz, soil scientist, Northern Virginia Soil and Water Conservation District, three FODMers conducted biological quality testing on an unnamed stream flowing into the western part of Dyke Marsh on April 2, 2016.
The group only found 72 invertebrates, fewer than the desired 100, but more than Schwartz had anticipated.
Thanks to members Laura Sebastianelli and Deborah Hammer, FODMers are conducting a frog and toad survey in Dyke Marsh and other areas, as part of the FrogWatchUSA national monitoring program. People living near Dyke Marsh West have heard fewer frog and toad calls in recent years and FODM would like to document species and trends.
FODM Board member Jessica Strother, a forester, led a walk on February 27, 2016, and described three of the ecotones of the preserve: the swamp forest, the floodplain forest and the tidal marsh. She explained that trees breathe through their leaves and root system. Trees like the pumpkin ash tolerate water, but cedars like drier, upland soil.