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to low scrub only a few feet above ground. Probably usually in muddle. The Atlapetes types ranged from approximately 5 ft to only a few inches above ground, in a variety of bushes and shrubbery. [[margin note in red]]Laf Ruf[[/margin note]] The deglovines[[?]] did much the same thing, except that they never went so low (probably never lower than 1 1/2 ft. above ground).
     This flock was [[underlined]]not[[/underlined]] very noisy. All or almost all the birds uttered "CN"s. A great variety of "Trit"s. The only species know to have "sung" in the flock were the Fire bellies and the Atlapetes XIV. The Fire bellies uttered several phrases, at long intervals. Largely or completely composed of "Ta-auts" type notes. The XIV's also sang at long intervals. Their loud clear, wren-like, song (probably being used as "greeting" when one bird re-joined its mate.
     A Duburia certainly sang, once (several phrases), while I was watching the flock, but I don't know if it was the bird that had been in the flock (if there was one), or, if so, if it was still in the flock when it sang.
     The most peculiar feature of the flock was that it seemed to be largely or completed composed of followers. No leaders. No passive nuclear species. This is peculiar. It might seem to contradict my suggestion that mixed flocks develop from an original association between a passive nuclear species and one or more active nuclear or attendant species. But I wonder if this flock might represent an early stage in the degeneration of an "association" (in process of being transformed from something like the mixed flocks near Merida to the groups of [[underlined]]un[[/underlined]]-associated spe