25 Records

Green-faced Clubtail (Hylogomphus viridifrons) is an interesting and often scarce species that prefers clean creeks and rivers with sand or silt substrate, often with rocks or gravel bars. Males are frequently found perched on rocks at favored riffles, or hovering low over the water close to the riffle (Paulson, 2011). In Maryland, this species was considered to be extremely rare, but is now known to inhabit the Potomac River and several of the larger tributaries in the Valley-and-Ridge, plus stretches of the Casselman River in Garrett Co. (Richard Orr's The Dragonflies and Damselflies of Maryland and the District of Columbia). The Casselman is a tributary of the Youghiogheny River, where E. B. Williamson took the type specimens at Ohiopyle, PA. This species is rare in Maryland, and is ranked as S1 (highly state rare).