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Mixed Diglossini, May 27, 1965, V.  (29)

^[[Cy]] 9:50 a.m.  Back at Korea Station.  Cys at edge of clearing still Singing frequently.  No other Diglossines or Whitestarts audible.

REMARKS:  One flock seen about 9000 ft this afternoon was particularly interesting. For two reasons:

^[[WCC]]  I.  [[underlined]] Ensifera [[/underlined]] seen with flock twice.  And once it supplanted a [[male symbol]] WCC.  Conceivably, this hummingbird may be an important factor (enemy and/or competitor) in the life of some or all of the local Diglossini.

^[[WCC Cy]]  II  The [[male symbol]] WCC was seen to join and follow Cy.  Reactions quite conspicuous and unmistakable.  This probably is not surprising, in view of the fact that [[male symbol]] WCC's are quite similar to Cys in both color and pattern.

^[[WCC Cy Sitti]]  But I wonder why I never saw such conspicuous WCC-Cy reactions on Munchique???  Do WCC's prefer to associate with Sittis, when the latter are available???

^[[WCC Cy]]  It is too bad that I never saw WCC's in the Central Cordillera.  As the [[male symbol]] WCC's there have white caps (rather than blue caps like the [[male symbol]]'s here) they [[underlined]] may [[/underlined]] be less similar to Cys in appearance.  It is conceivable that the [[male symbol]] WCC's here are actually "mimicking" Cys.  (This is all the more likely as Sittis probably are relatively rarer in the comparatively low and very wet Western Cordillera than in the higher, and presumably drier on the average, Central Cordillera.)

^[[WCC]]  It may be significant that the WCC's which Lehmann collected in the Central Cordillera were with tanagers rather than Cys.

^[[WCC Black]]  In any case, it is obvious, now, that WCC's are [[underlined]] much [[/underlined]] commoner in the Western Cordillera than in the Central.  This may be correlated with a greater development of lush temperate forest in the Western Cordillera.  (Perhaps some extra food also is available to WCC's here because "Black Diglossas"