Unmistakable call. Stayed around wooded area by the lake, occasionally getting mobbed by american crows.
Powderhorn WMA iNat BioBlitz.
Headed back up a gravel road toward headquarters while investigating the vegetation, et al.
Reminds me of the yaupon thickets in Lee County, but thicker.
Washington, DC's second documented ROSP.
Location approximate, but pretty darn close to just where it was.