East shore of Upper Blackweelder Lake. This location is between historic sites at Lower Blackwelder Lake and Miller Dam. Approximately 500 tricolored blackbirds appeared to be establishing a colony. Individuals were seen carrying nesting material. Large number of red-wings present, too.
A subsequent visit to the site with bird experts Ted Beedy and George Visger showed no colony, but a few individuals nearby.
On Beale AFB, go north on B street from intersection of 34th, past pavement. Turn left at cattle corral. Approximately 1/4 mile over the ridge is Upper Blackwelder Lake.