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Mixed Diglossini, May 27, 1965, IV.  (28)

Hear some Slatethroat Songs in distance.  No Diglossine or Yellow face Songs audible at the time.

Go along path in forest.  Slightly up hill.  6:50.  Hear Yellowface Singing.  No Diglossine or Slatethroat audible at the time.  Again.  This time the Song seems to provoke "return" Song by another individual – either another Yellowface or (less probably) a [[underlined]] lafresnayei s.l. [[/underlined]]  Then both shut up.  Then (first) Yellowface Sings again.  Shuts up.

Reach edge of another pasture.  More Yellowfaces Singing in distance.

^[[44]]  Sun is shining brilliantly now 6:55.  See Yellow face ^[[checkmark]] Singing.  Definitely alone.  In various trees edge forest, 15-30 ft up.

^[[Coer?]]  7:05.  Hear what might, [[underlined]] conceivably, [[/underlined]] be Coer Songs in distance.  But can't see bird.  In any case, it soon shuts up.

^[[Cy]]  Then hear typical Cy Songs in distance.  No other diglossine or Whitestart audible at the time.  Shuts up.  Then Yellow face Sings a few phrases.  Shuts up.  Then Slate throat Sings some phrases.  Shuts up.  During next few minutes, hear more Songs by Cy(s), Slate-throat(s), and Yellow-face(s).  [[underlined]] None [[/underlined]] overlapping!

SEE ALSO TODAY'S NOTES ON GENERAL MIXED FLOCKS

COMMENT:

^[[Cy]]  Cys certainly are largely arboreal here, just as in Munchique.  The Cys seen today may even have ranged higher than the birds seen on Munchique (perhaps the trees here are higher on the average than the ones in many of the areas on Munchique where I saw Cys).  But the Cys here certainly come down into scrub, to elevations above ground which also are reached by Albis, at least occasionally.  I.E.  the 2 species certainly are not perfectly "stratified" here.