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[[circled]] 7 [[/circled]]

[[left margin in red]] Inter [[/left margin]]

ent). Similarly, the [[underlined]] Basileuterus [[/underlined]] species, which might attract such things as Inters and [[underlined]] Myioborus [[/underlined]] also seem to be about.

In general, it is quite obvious that the avifauna here is much less diverse now than in September, 1962. This is rather surprising, as the vegetation doesn't seem to have changed at all (except that flowering is different).

Where are the missing species? Have they all gone downhill? Because of bad weather???

III It has just occurred to me that all or almost all the species which are "really" passive nuclear throughout the whole of the higher part of the Andes show striking similarities (in addition to their roles in inter-specific reactions). [[underlined]] Atlapetes, Chlorospingus, Hemispingus, Basileuterus. [[/underlined]] All have similar vocal repertories, body proportions, and general type of coloration. These similarities extend to species which are not sympatric,  and also to species which do not play a special role in mixed flocks. Thus, the similarities cannot be the result of mimicry. Are all these genera really closely related to one another???

April 6, 1965
Paramo la Negra

Arrive same place as yesterday 5:55 am. Still very dark. Clear. Cold. Everything quite silent.

Now my altimeter says 9025!

As yesterday, there is very little dawn song. And certainly nothing that sounds like a diglossine, tanager, or [[underlined]] Myioborus. [[/underlined]]