Greetings,
Not sure if Bufflehead Lake (across Mineral to the South of Cooley Lake, near Carson Nature Center, Littleton) is in Jefferson or Arapahoe County, as the border is right there somewhere.
But from the bird blind at the south end of the lake there was 1 adult Tundra Swan, in the SW corner. About 3:00- 3:30 pm.
Good numbers and good variety of winter ducks on all the nearby lakes and ponds.
Also 1 female Long-tailed Duck on South Platte Res.
Dave Cameron
Denver