There is a female Long-tailed Duck on the lake next to the parking lot at the 88th Avenue Open Space in Adams County. This lake doesn’t appear to have a name, so here’s a link to the parking lot coordinates
She was associating with a small group of Buffleheads when I saw her.
I also saw a single Brewers Blackbird at the edge of the lake.
Amy
Amy Cervene
Arvada, JeffCo