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Atlapetes, Mar. 28, 1960, III 

It is interesting that neither the chestnut-capped nor the Yellow-throated Atlapetes perform "greeting" songs when one mate joins the other. In this respect, the rufinucha birds described above on Aug. 9, 1959, p. 9., may be intermediate between the Atlapetes ssp. here and Pselliophorus - just as they seem to be intermediate between Atlapetes and Chlorospingus in some other respects.
 
Atlapetes, I. 
     
March 30, 1960
Cerro Punta
   
We caught two Yellow-throats in the nets this morning. Both quite silent, although they struggled vigorously and tried to bite.
   
It might be supposed that the absence of HAC in such circumstances, which seems to be characteristic of all bush-finches and bush-tanagers except [[?]] was simply correlated with their gregarious habits (i.e. these birds might not be able to use a high intensity aggressive pattern were it not for the fact that the chestnut-capped Atlapetes (and presumably the Orange-billed Sparrow) are also quite silent when handled in the net.

Atlapetes, I. 
                                   
March 31, 1960
Cerro Punta 

We caught another pair of Yellow-throats in the nets this morning. Both quite silent when handled, as usual. One of the birds, however, (probably the [[male symbol]]) performed repeated Gaping in my hand after I got him out of the net. The bill opening (quite widely) and closing, repeatedly, in a moderately fast rhythm. Accompanied by CR. This [[?]]