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[[circled]] 76 [[/circled]

Mixed Diglossini, Apr. 6. 1965, IV   

[[margin]] Albi Glor [[/margin]]
I hear these Albi-like songs only during the first few days of my observations. After this, they stopped. This may have been an example of the way in which relatively rare species are forced out of an area by the behavior of more common species.

April 7, 1965
Paramó La Negra

SEE TODAY'S NOTES ON GENERAL MIXED FLOCKS.
(Chorros de Milla — first sight of Glor)

COMMENT:

[[margin]] Glor [[/margin]]
I. I am surprised to have seen so very few Glor at the Paramó La Negra this trip. Perhaps the birds are just keeping low in the scrub. But I doubt it. It seems far more probable that they have moved. Presumably down hill. This hypothesis certainly is supported by the appearance of a Glor below Chorros de Milla this afternoon.

[[margin]] Gen [[/margin]]
II.  If the Glor really are migratory (or nomadic), this must tend to increase overlap, and competition, between species. (Really, the amount of competition between species here is fantastic.

[[margin]] Gen [[/margin]]
III. As of now, it is known that carbonaria s.l. ssp. compete with all species of Andean Diglossas (with the possible exception of glauca), Coereba, and all the Andean Conebills (with the possible exceptions of the bright blue, white-capped, species of lower altitudes), as well as many other types, such as the XCC (in all probability) and hummingbirds.