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[[handwritten]] 8 [[/handwritten]]

female, uttering “Chah” Notes in flight.  One of these copulation attempts was apparently successful, the other obviously unsuccessful. In neither case was there any other display by either bird before, during, or immediately after the attempt.  The third attempt was a little more elaborate.  A female landed in a tree, uttering “Chah” Notes as she did so.  Then she [[strikethrough]] shut up [[/strikethrough]] ^[[insertion]][[handwritten]] FELL SILENT [[/handwritten]] [[/insertion]], but assumed a Bill-up Tail-up Posture, with her breast lowered and all the plumage of the lower breast and belly fluffed or ruffled.  At the same time, she stretched her wings out horizontally, but apparently did not quiver them.  Then a male, who had been perched quietly in a tree about twenty feet away, flew straight on to her back and began copulatory movements immediately.  The copulation was apparently successful.  There was no post-copulatory display, but the two birds eventually flew off together uttering “Chah” Notes. 

THE BUFF-THROATED SALTATOR [[underlined]] (S. maximus) [/underlined]]

     Wild individuals of this species were studied in the same areas of central Panama as Streaked Saltators between March, 1958, and April, 1962; and captive individuals also were kept in aviaries on Barro Colorado Island.  According to Hellmayr [[underlined]] (op. cit.) [[/underlined]], these birds should have been examples of the subspecies [[underlined]] intermedius [[/underlined]].

     Buff-throated Saltators are larger than Streaked Saltators but somewhat more slender in build.  They often occur along the edges of scrub and second-growth forest which is somewhat taller (and presumably older) on the average than the scrub preferred by Streaked Saltators; but the territories or home ranges of individuals of the two species may be broadly or completely overlapping in many areas.  Individuals of both species sometimes occur in the same trees.  They may even sit or feed in the same branches --- but apparently never simultaneously.  I have never seen (or heard) any overt, positive, reaction between individuals of the two species (but this does not necessarily mean that the