A flock of a dozen Redheads was present at Centennial from 4:30 to 4:45 p.m. 
Nancy Magnusson and I indepedently found them.  They were last seen 
departing downstream at 4:45

Nine Canvasback were present and remained.  Plus one each Bufflehead, Ruddy 
Duck, and Coot.  I didn't get a chance to count Ring-necked Ducks.

Kurt Schwarz
HowCo
goawaybird at verizon dot net