I found this guy at a local park.
Buffleheads in take-off
At Turkey Run
Tidal basin cherry tree. [According t dc.about.com, most of the trees are Yoshino Cherry. Other species include Kwanzan Cherry, Akebono Cherry, Takesimensis Cherry, Usuzumi Cherry, Weeping Japanese Cherry, Sargent Cherry, Autumn Flowering Cherry, Fugenzo Cherry, Afterglow Cherry, Shirofugen Cherry and Okame Cherry. ]