Viewing page 124 of 180

This transcription has been completed. Contact us with corrections.

[[circled]]82[[/circled]] [[circled]]120[[/circled]]

Leaving 9:27 am

The absence of the KM 50 flock during my last 2 days observation here would suggest that such highly organized flocks may range over very large distances.

It is my impression that individual Whitestarts remain with mixed flocks only while the flocks remain within their (the Whitestarts') own territory. This may also be true of all or most of the other species frequently associated with the mixed warbler flocks; but this is difficult to establish, simply because the other species tend to have larger territories and/or hide under cover more frequently.

I don't really think that the association of more than 2 Basileuterus XLI in one flock is usual. Probably occurs only when 2 pairs of XLI's are disputing. But, as in the similar case of Yellow-thighed Finches and Sooty-capped Bush-tanagers in chiriqui, the sheer noise and conspicuousness of mush disputing tends to ...[[?]] the coherence of the flock. 

[[margin in red]] Myst [[/margin]]
There is no doubt but that Mysts are avoiding the mixed flocks. This may be simply a reflection of the fact that they are not breeding now, i.e. are not very aggressive. They may not be aggressive enough to want to "shepherd" intruders out of their territories.

October 31, 1963
Near Unduavi

Going to work just above Unduavi this morning. Same place where Z CC's were seen the day before yesterday.