![Transcription Center logo](/themes/custom/tc_theme/assets/image/logo.png)
This transcription has been completed. Contact us with corrections.
(20) Mixed Diglossini, May 5, 1965, IV. [[margin]] Cy [[/margin]] Then suddenly one bird flies straight toward the other. The other flies, and both plunge down toward ground. Only a foot or so above ground, they suddenly swerve and fly off into distance. The downward plunge was accompanied by Twitters [[underlined]] without [[/underlined]] Intro Notes. Another "Pounce" like incident! "Pounces" may be characteristic of Diglossa??? NOTES: I. The Laf-like Songs heard around here definitely are uttered by Yellow-faced Whitestarts. So the nature of the Black Diglossa-type seen the day before yesterday remains problematical. [[margin]] Albi Cy [[/margin]] II. As far as my observations go, the territories of "Glaucs" and undoubted Albis are mutually exclusive. And Cys are equally stratified over both. [[margin]] Cy Gen [[/margin]] III. This morning's observation would suggest that the Cys are breeding here now. Certainly the other diglossines are not. This is not surprising. I received the impression, in other parts of the Andes, that Cys bred twice a year. IV. If [[underlined]] glauca [[/underlined]] really is similar to [[underlined]] albilatera [[/underlined]] in ecology, habitat preference, etc., this might help to explain why [[underlined]] albilatera [[/underlined]] does not occur in the southern Andes. I.E. [[underlined]] glauca [[/underlined]] takes its place there. ([[underlined]] glauca [[/underlined]] may well have originated in the south. It does not reach Venezuela.) V. The absence of overlaps between the Laf-like Songs of the Yellow-faced Whitestart and the Whistle Songs of the [[underlined]] Atlapetes [[/underlined]] (certainly [[underlined]] rufinucha [[/underlined]]) this morning was most interesting. Perhaps this sort of mutual inhibition is widespread in birds??? [[margin]] Caer? [[/margin]] VI. Thinking it over, I can see absolutely no reason why Caers shouldn't occur here. So perhaps the peculiar song heard yesterday near the top