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Mixed Diglossini, July 22, 1965, II.

hostility toward one another.  But this is (another) point which must be checked by further observations.

[[margin]] Caer [[/margin]]  I was rather surprised not to see Caers today.  If I understand the ecology of Caers, this is an area where they should be found.  We will see!


July 23, 1965
Valley of Rio Urrao

Going along same path this morning that we followed yesterday afternoon.

Arrive approximate area where first Bruns seen yesterday 5:15 a.m.  Still dark.  Overcast.  Windy.

First thrush and Andean Sparrow noises 5:27 am.

Then the thrushes drop out and Andean Sparrows continue "full blast".  Still quite dark 5:40.  More thrush calls (alarm).  Then Acorn Woodpeckers start 5:42.

Something begins DC-like sounds 5:48 a.m.  But still there are remarkably [[underlined]] few [[/underlined]] species participating in "Dawn chorus".

Hear what may be first diglossine twitter in distance up hill 5:51 a.m.

Then hear first Yellow-faced Whitestart songs 5:55.  [[underlined]] Partially [[/underlined]] overlapping twitters (which may be diglossine – possibly Cy – but which I am not sure about.)  Then twitters and Yellow-face phrases alternate [[underlined]] without [[/underlined]] overlapping.  Then more overlapping.

And now, 6:02 a.m., I [[underlined]] see [[/underlined]] the bird uttering the twitters.  It is a [[underlined]] cyanocephala [[/underlined]] !!!  Each twitter phrase composed of a variable number of