[EBB Sightings] Wood Duck on Lake Anza

I was doing a little scouting this morning in my CBC count area, and there 
was an adult male Wood Duck feeding with the Mallards on Lake Anza in 
Tilden Park (Contra Costa).  I don't bird that spot a lot, but have anyway 
not seen one there before, and I see that it hasn't been recorded in  the 
CBC in the South Tilden area since at least 1986, so... maybe a very local 
rarity, or unusuality.

George Griffeth