Flies in this group require dissection to identify to species.
Thanks to John F. Carr at BugGuide.net for the ID: https://bugguide.net/node/view/2116009
Patuxent River State Park â Elton Farm Rd., Montgomery Co., Maryland; Sandy Spring quad
This is a picture of Callirhytis quercusgemmaria on a an oak at Quiet Waters Park near Annapolis, Maryland.
This is a picture of a snail at the Avalon Area of Patapsco Valley State Park in Howard County, Maryland.
This is a picture of a Chelydra serpentina in the pond at Cedarville State Forest in Charles County, Maryland.
This is a picture of Persicaria virginiana at Cedarville State Forest in Charles County, Maryland.