Friends of Dyke Marsh is a volunteer group dedicated to preserving, restoring and enhancing Dyke Marsh, a freshwater tidal marsh in Fairfax County on the Potomac River just south of Alexandria, Virginia. The Dyke Marsh Wildlife Preserve is administered by the National Park Service.

What Is Dyke Marsh?

The Dyke Marsh Wildlife Preserve is a freshwater, tidal marsh on the Virginia side of the Potomac River in Fairfax County. It is a unit of the George Washington Memorial Parkway, U.S. National Park Service. For more information, visit the NPS website at www.nps.gov/gwmp.

An FODM Ecology Walk

On June 25, 2022, ecologist Charles Smith led a walk for 20 members of the Friends of Dyke Marsh along the Dyke Marsh Haul Road trail. He explained that Dyke Marsh is in the coastal plain, a geologic region with gravel deposits, unlike the Piedmont which has many rock formations. Dyke Marsh, a freshwater tidal wetland, has two three-foot tides a day, on average.

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FODM Recognizes Volunteers

On June 19, 2022, the Friends of Dyke Marsh held an event to express appreciation to the organization's many dedicated volunteers. Here is an article about the event from the June 23, 2022 Mount Vernon Gazette/Connection newspaper. By Glenda C. Booth

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Awed by Owls

Many people have been captivated by owls in Dyke Marsh this spring. Several people have confirmed a barred owl (Strix varia) pair raising two young and a great horned owl pair (Bubo virginianus) with one young. It’s parenting at its best.

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Curbing Plastic Pollution

Plastic Bottles

From plastic bottles to plastic straws, fishing lines, clothing, carpets and diapers, plastic in the environment is ubiquitous. Sarah Kollar from Ocean Conservancy and Kurt Moser from the Four Mile Run Conservatory Foundation discussed both the challenges of and solutions to plastic pollution in presentations at a May 19, 2022, FODM meeting. 

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FODM Reaches Out

In April 2022, the Friends of Dyke Marsh reached out to the larger community when we participated in two community events and offered materials and information about FODM and Dyke Marsh.

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Bald Eagles: Their Comeback and Challenges

“Virginia’s tidal rivers are just loaded with bald eagles,” Jeff Cooper told 210 people attending the March 2 FODM meeting and the Chesapeake Bay is the epicenter of eagle conservation. The area from Dyke Marsh south to where route 301 crosses the Rappahannock River is a bald eagle concentration area.

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Wintering Waterbirds

The Potomac River and associated habitats are prime areas for many wintering waterbird species, Greg Butcher told FODMers and friends at their October 20, 2021, meeting on Zoom.

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New Exciting Sightings

Long-tailed skipper butterfly

Keen observer and former Friends of Dyke Marsh president Ed Eder documented three new species between June and October 2021, one new to the preserve and two also new to the George Washington Memorial Parkway.

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