After enjoying the Tufted Duck at Cambridge, I located an adult Ross'Goose at pool 3B at Blackwater, about 3:15 p.m.  

10+ White Pelicans were also present out in the marsh opposite 3B.  A Merlin showed briefly by 3D.  And a male Harrier put on a nice show at the visitor center entrance.

Kurt Schwarz
HowCo 
goawaybird at comcast dot net