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89

Atlapetes, Sept. 25, 1962 II     

trill obviously intermediate between "seeeeeeee" or "zeeeeeeeee" of Warble and ordinary R.
  
The Warbles are often rather "pumping." Quite reminiscent of Pselliophorus. 
  
This is by far the noisiest bush-finch I have seen, except for Pselliophorus. Obviously not coincidental that it plays same vocal role as latter.

Atlapetes, I 

September 26, 1962
Paraimo La Negra
  
One bird starts singing this morning by uttering lots of phrases like "Tseeet-sa-wheet wheet" This is obviously first half of "complete" song. It is only about 5:58 that this bird starts to add "Feeoo" notes to song.
  
Walking along road 7:15, come across same pair of PL's that were so noisy yesterday. Just as noisy today, in the same way. Then realize that there is (are) 1 or 2 more PL's nearly, also uttering same "greeting"- hostile calls. General hubbub. Coming back 7:30, come across 1 or 2 PL's same place. Very quiet. Utter "Seeet"s, no war. So the noisiness of this species seems to increase near boundaries of territories, in same way as in Pselliophorus. Presumably serves same function.