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Mixed Diglossini, May 15, 1965, I. (30) ^[[Laf]] 6:16 am. Whitestarts have been Singing for some time. Off and on. Then hear first Laf Song. At a time when all the local Whitestarts are silent. ^[[Laf]] 6:35 am. There have now been quite a lot more Songs by both Whitestarts and Lafs But neither species is Singing very frequently or continuously. And there have been no Song overlaps. ^[[Laf]] 7:50 am. Laf(s) still Singing down by road when everything else quiet. ^[[Laf 167]] 8:05 am. Walking along road. See Laf ^[[checkmark]] supplant another bird. In small tree alpine scrub. 15-20 ft up. Unfortunately can't identify supplanted bird. But the aggressive Laf Sings for a minute or so immediately after the supplant. ^[[Laf 168]] A minute later, see another Laf ^[[checkmark]] feeding dark red cup shaped flowers right at edge of road. Silent. 3-6 ft up. ^[[Ater?]] 8:35 Hear what is either Cy or Ater Singing in distance. No other diglossine or Whitestart Singing at the time. Bird utters about 4 phrases. Then shuts up. SEE ALSO TODAY'S NOTES ON GENERAL MIXED FLOCKS COMMENT: The difference between the Diglossine fauna of the area where I worked today and that of the area where I first began to work is really enormous! This would suggest that ecological segregation really is quite appreciable in this region. (The tanager and finch faunas of the two areas also differ, but much less than the diglossine faunas.) ^[[Gen]] All in all, I am gradually coming to the conclusion that the social organization of the birds here is almost perfectly intermediate between that of the birds of the Eastern Cordillera and that of the birds of the Western Cordillera. (This does not necessarily mean that the birds here are not also
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Moved "-lso" from beginning of next page, per hyphenation rule.