Viewing page 73 of 74

This transcription has been completed. Contact us with corrections.

[[circled]] 72 [[/circled]]
Tangara, Apr. 19, 1962, II

[[upper left page]]
[[paper clip rust stain]]

[[left margin]]
[[three yellow vertical lines & 1 yellow cross-hatched vertical line top to bottom]]
[[/left margin]]

Throat are extremely variable. some could be transcribed as "Dzheet" while others should be transcribed as "Dzhut". Some of the "Dzheet"s are much higher-pitched and more urgent-sounding than others. The most high pitched and urgent are very reminiscent of the PN's of other species. I think that these PN-like notes are usually uttered by birds flying away (when there are other birds nearby?). They are presumably either real PN's or FCN's.

5:10 p.m. Hear a single silver-throat, apparently alone, uttering a very distinctive series of "Dzhut" notes. Very regular. Approximately 24 per minute. Notes themselves are comparatively short, harsh, and low-pitched; but not rattling. The bird continued uttering such notes for at least 10 or 12 minutes. Occasionally interrupted by single "Dzheet"'s (not as high-pitched or urgent as the "PN" or "FCN") From several different stations, in different but adjacent trees. Bird usually perching at each station for an appreciable length of time. Probably in sem-H Posture. With lots of pivoting (really just switching from side to side). Many WF's. Probably also many TF's. I couldn't see the bird awfully well, as I was usually just below it, but I think it had its underparts fluffed part of the time it uttered this series of notes. Once it briefly fluffed or ruffled the yellow back feathers. The wings were always slightly drooped (except during WF's). 

This series of notes may have been a hostile reaction, provoked by my appearance, or (much more probably, I think) an attempt to call in a mate. The whole performance was much more like DCing than anything else I have ever observed in callistes. Certainly by far the most regular series of notes I have ever heard uttered by this species.

The bird eventually flew off down the ravine. Fell silent as it took off. I think it probably went to join its mate, as I found 2