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time. Perhaps a combination of "ordinary" Wails and some "OB" or "BB" like pattern.  Or, perhaps more accurately, Wails given in a "high intensity pumping rhythm."  I shall call this pattern "WWB".

     The more aggressive individual also uttered Growling noises.  And performed a brief Arch, and some indications of Jud.  And once it definitely Rubbed its chin or upper throat, and also the lower part of the side of the face, against a branch.

     The WWB of the one visible individual followed a couple of minutes after a most peculiar utterance from another individual.  Invisible. Downhill to left. A sort of Hyaena-like "laughter". I shall call it "Hyaena" tout court. Rather similar to WWB, but rather clearer in tone. Perhaps could be transcribed by something like "Oooah ha ha ha ha"

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    After some minutes, the 2 visible inds. move away from me, to right.  Begin to vocalize a little less rapidly.  But still continue a few wheezz Roars, Growls, Grunts, and Wails.  And at least one of the inds. begins to utter Trill-Grunts.  Quite like those heard near Valparaiso. 

     Then there are more sounds from the invisible