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91

Ramphocelus, Jan. 17, 1962, III.          

here during the last 2 days.

Although reproductive behavior seems to have hardly begun here, it is noticeable that males are seen perching high in trees much more frequently than are females or juvs. The latter tried to stay hidden low in thick shrubbery.


Ramphocelus, I  
  
January 18, 1962
Rio Piedras 

Arrive same area early, 6:10 a.m. Still not quite light. Birds silent.

Hear first NN's in distance, at 6:30. Followed almost immediately TssN's and Ф calls.

Single male perched high on exposed perch. Uttering NN's, TssN's, and Ф's (brief). Then NN's as starts to move around. Then TssN's and Ф's when he sits still again.  Apparently in random sequence 6:35. Then flies away, presumably to join companion. Then back. Uttering NN's as he comes in. Companion(s) he left behind also uttering NN's. Then gone again.

Both birds flying about. Uttering lots of NN's. Responsive. In alternation. I think this species may utter NN's even more frequently than the Crimson-back.

There is a single male Crimson-back here. Uttering APCN's,in indeterminate series, just like my captive bird!

(As an indication of the state of the birds here, I might add that I saw a male Crimson-back performing typical Dawn Calling yesterday morning.)