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[[circled]] 5 [[/circled]]
fast. Incidentally, the rain is coming down quite hard during this whole period of observation.
  This is the [[underline]] first [[/underline]] time I have ever seem Yellow-bellies and Fire-bellies same area. Is it significant that the Firebellies were seen a few feet up fill from the Yellow-bellies??? Certainly, the two species were found in very similar vegetation.
  Leaving 9:45 am
  On way down, on Road from Puracé to Popayán, 9200 ft, region [[margin, in red]] Ater? [[/margin]] of drier looking record growth scrub, hear song phrases which are almost certainly uttered by Ater. Twitters with sub-terminal R's. (The only other possibility in that these phrases were uttered by Baris.)
  COMMENT: It looks very much as if the degree of gregariousness here will be much the same as in the Eastern Cordillera. Or, possibly, intermediate between the Eastern and Western Cordilleras.  Certainly not very much like Quito. This would seem to indicate that the "frontier hypothesis", by itself, is an inadequate explanation of all the variations in aggressiveness.
  My observations this morning would [[underline]] suggest [[/underline]] that bad weather, i.e. rain, has a [[underline]] depressing [[/underline]] effect upon the formation of mixed block here.
  NOTE:  The whole Puracé region (i.e. near the town of Purace itself) is on the western slope of the Central Cordillera. I.E. it probably gets as much rain as the eastern slope of the Western Cordillera. Certainly it is very humid.
  I am becoming more and more convinced that such species as the Yellow belly and the PR Atlapetes and confined to relatively humid environments.