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[[underline]] Saltator [[/underlined]], April 7, 1958, III. [[circled]] 10 [[/circled]]

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whenever the latter comes too near.  Yellow left has only perched on the top branches in the aviary this afternoon when the first bird has been down feeding.  I think it is safe to say, as a result of my observations of captive birds and wild ones in several areas, that neither the Streaked nor the Buff-throated Saltators have the slightest trace of gregariousness - at least at the present time.
[[underlined]] Saltator [[/underlined]], I  April 10, 1958
Frijoles
I had a few brief chances to hear WS's by Streakeds near the RR station this evening. Apparently 2 different birds involved. Their WS's quite different.
One bird gave a WS comme ca:
[[image - two short lines; followed by a longer third line slightly below; followed by a long fourth line slightly above which starts and ends straight with a slight upward curve along the middle; followed by a downsloping wavy line]] Like the WS described on Apr.7, p.9, but the last long note usually followed by a soft rattle. This "rattle" is really the same thing as the "rattle undertone" mentioned above - and in some of the WS's of this bird, it seemed to begin, somehow, before the last long note was finished.  (This soft rattle must be produced by some very different mechanism than the pure notes.)  This bird gave its WS's repeatedly, again & again, perched by itself, alone in the top of a tree, without apparently inducing any response by any other bird.  Finally flew away and disappeared.  The WS's which were apparently given by another bird were as follows: