Piscataway Park

American eels are found everywhere along the Atlantic Coast, but many aspects of these fish remain poorly understood. They are perhaps one of the most mysterious fish in the Potomac watershed.

Looking for disease, including ranaviruses and chytrid fungi, is an important part of amphibian monitoring done by the National Capital Region Inventory & Monitoring Network. Learn more about the risks posed by these diseases and the biosecurity protocols field crews use to reduce the risk of accidental spread.

Habitat fragmentation is a major threat to amphibian communities, especially in National Capital Region parks at risk due to the region's growing urbanization.

The state of ash trees in 2017 in the National Capital Region after more than 10 years of harm from the invasive emerald ash borer.

Emerald ash borer (EAB) has killed most of the 300,000 ash trees in National Capital Region parks since 2014. Fewer than 80,000 living ash trees remain. Some ash-dominated swamps transformed into shrublands as ash root systems re-sprouted after EAB attack. In dry habitats, EAB proved more quickly fatal.

Emerald ash borer are still decimating ash trees in the National Capital Region. Read on for the latest look into the state of ash trees in our parks based on forest monitoring data.

Acoustic and mist netting in Fort Washington and Piscataway Park.

Black fountaingrass (Cenchrus purpurascens) is an invasive plant that is also a popular ornamental grass because of its red-to-purple-colored flowerhead. It can be found in plazas and housing complexes throughout the greater Washington, DC area and it spreads quickly. Learn how to identify it and how to help control its spread.