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[[circled]]12[[/circled]]

Dubusias, [[underlined]] B. nigrocristatus [[/underlined]] ^[[red check]], and White-bearded Flycatchers ^[[red check ]] (XVII) all occur in area. (Species checked seem to be common)
     The scarcity of mixed flocks here may be due to the fact that the PR Altapetes seem to be rare.
     This might suggest that the absence of mixed flocks in the Quito region may be due to the absence of nuclear species-- [[underlined]]not[[/underlined]] to a general reduction of inter-specific gregarious tendencies in other species.
     [[margin, in red]] Humer [[/margin note]] The only definite mixed flock seen today was formed when a single Humer joined a single, silent, PR Atlapetes (see today's notes on mixed Diglossini). The fact that PR was silent might suggest that its mere appearance, per se, is attractive.
     I heard PL Atlapetes at dawn, but never saw any birds. I am beginning to feel fairly certain that this species does not usually play a significant role in mixed flocks here.

[[in red]] OUT OF SEQUENCE 
Boqueron de Palmetas [[/red]]

October 21, 1962
Central Andes          Boqueron
Nr. Medellin

6:05am. 7500 ft. Edge of thicket along stream, bordering on fairly open grassland scattered with small trees. Come across mixed flock including 3 or 4 green Tangaras (XIX), one [[underlined]]Thraupis cyanocephala[[/underlined]], one pair Blue and black Tanagers, one Slate-throated Redstart, hummingbirds, probably others. Green Tangaras quite noisy, possibly or probably passive nuclear.
          1 [[underlined]] Th. cyanocephala [[/underlined]] s [[arrow pointing right]] green Tangara