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Mixed Diglossini, Oct. 24, 1962, II             22 

[[left margin]] Laf [[/left margin]] 
6:10 a.m. PR's still silent. "Laf" now alternatively phrases with B. nigrocristatus. Then starts to sing phrases only a second after the warblers do, so there are wide overlaps. 

[[left margin]] Laf Cy [[/left margin]] 
One thing I noticed yesterday. Both "Lafs" & Cys start to sing in response to "Whooosh"ing sounds by me. 

[[left margin]] Laf [[/left margin]] 
All the "Laf" songs consist of relatively short phrases, of relatively few notes. Birds here may be past peak of breeding. 

Finally see a definite Laf 6:28. 9400 ft. Silent. 

[[left margin]] Cy [[/left margin]] 
6:45 am. See single Cy singing typical songs in low open scrub and in low trees at 9500 ft. 

[[left margin]] Ruf [[/left margin]] 
7:00 am. See pair Rufs with mixed flock Fire bellies and PR's. 9600 ft. Rufs quite silent. 

SEE TODAY'S NOTES ON MIXED FLOCKS. 

[[left margin]] Coer Cy [[/left margin]] 
See pair of Coers (quite unmistakable) 8:10 am. 9500 ft. Feeding on insects on leaves. In exactly same trees where I saw singing Cys earlier, when I thought 2 pairs of Cys were engaged in boundary dispute. (See notes on mixed flocks) Dispute seen earlier way actually have been between Cys and Coers — but I doubt it. 

[[left margin]] Coer [[/left margin]] 
Coers seem to respond to neighboring PR Atlapetes songs. Begin to sing phrases a second after PR's. Wide overlap. 
[[left margin]] Mixed Flock Notes important → [[/left margin]] Coer songs composed of relatively short phrases with introductory "Tseet" Notes. 

[[left margin]] Humer Coer [[/left margin]] 
Coers silent up for a minute, and I start to write my notes. Then I look up and see single Humer perched in tree exactly where Coers were a minute ago!! Utters, typical Humer song, with sub 

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