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(4)

[[underlined]] Conirostrum, [[/underlined]] I.
May 27, 1960
Ca. de Iñaquito

Watched more Conebills, in the same area as on May 25th.  Behaving in much the same way as before.

An aerial chase, involving 3 birds, almost certainly strongly hostile, was accompanied by fast, buzzy, relatively harsh "Zee Zee Zee Zee Zee ..." notes.  (David would transcribe these as "Zee Wee Zee Wee Zee Wee ...)

We managed to observe a lot more singing.  The songs of these birds seemed to be even more twittering than those of the Atacaso birds we watched yesterday, but perhaps more uniform ([[underlined]] i.e. [[/underlined]] with fewer changes of pitch).  Probably also longer.  Each song phrase usually contained more notes, on the average, and the phrases were usually repeated, more frequently repeated (in other words, the songs of these Iñaquito Conebills were more like those of [[underlined]] Diglossa lafresnayei, [[/underlined]] while the songs of the Atacaso Conebills were more like those of [[underlined]] D. aterrima [[/underlined]]).

We heard one song, apparently uttered as "greeting" when one mate joined the other, which might be transcribed as "Zee Zee Zee Zee Zee Zee ...." or (perhaps better) "Zee-uh Zee-uh Zee-uh Zee-uh ..."  Very fast and twittering.  The notes were less harsh and buzzy than the "Zee" notes during the aerial chase mentioned above.

The most common form of song seemed to be slightly different.  It seemed to consist of approximately 6-note phrases, usually repeated once or twice without interruption:
– – – – – /  – – – – – /  – – – – – / etc.
or [[image: drawing of note phrase]]  It might best be