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Eastern Cordillera Colombia       13

Mixed Diglossini
October 22, 1962
Parámo de Guasca

[[left margin]] Laf [[/left margin]]
Arrive Laf area 5:30 am. Pouring rain and mist. Can hear Lafs singing. 

[[left margin]] Humer Laf [[left margin]]
Altitude here is 9700 (uncorrected). On road itself, 5:45 am. Hear what sounds like Humer song. With sub terminal R's. Unfortunately not visible. After bird stops singing, 2 Lafs begin to sing in adjacent branches. On either side of where the presumed Humer sang.

[[left margin]] 5 Humer [[/left margin]]
I think I may also have heard another Humer ✓✓✓✓✓5 singing a few minutes earlier. Again not visible.

[[left margin]] Humer [[/left margin]]
If these birds were Humers, they were almost certainly not the same as the Humer observed a month ago. At least 300 yards away. 

[[left margin]] Humer Laf [[/left margin]]
6:10 am. Again hear burst of what sounds like Humer song without actually seeing bird. These songs seem to overlap in a completely random manner the songs of a distant Laf (probably approximately 200 years away). 

[[left margin]] Humer Laf [[/left margin]]
Then presumed "Humer" shuts up. Several Lafs sing. Shut up. "Humer" sings. 1 Laf utters 1 phrase while "Humer" sings. Shuts up. "Humer" continues singing. Shuts up. Laf sings Then shuts up. 

[[left margin]] Laf [[/left margin]]
6:30 am. It is possible that Lafs are singing a little less frequently now than last month. Difficult to tell because of rain today. In any case, the difference is no more than slight. As far as I have been able to determine, the territories of the