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Mixed Diglossini, May 3, 1965, II.

[[margin]] Gen [[/margin]]  early discussions of the evolution of the Diglossini.  The species which I thought preferred relatively dry environments probably really prefer relatively open environments, wet or dry.

[[margin]] Albi [[/margin]]  Leaving aside Cy, perhaps the habitat preferences of the 3 other presumed Diglossas here can be summarized as follows:  Albis range from moderate to high elevations.  Usually in low second growth scrub or "alpine" scrub;  but they don't mind if the scrub is very humid, and they don't mind if their are large "upper sub-tropical forest" type trees close by.  (I have no evidence, however, that they occur [[underlined]] inside [[/underlined]] upper sub-tropical forest, away from edges.)  
[[margin]] Gloriss? [[/margin]]  "Glaucs" seem to occur in much the same type of habitat as Albis, in the lower part of the Albi range.  Gloriss's (or whatever they are) occur in more open scrub than Albis, in the medium part of the Abi altitudinal range.

[[margin]] Cy [[/margin]]  As far as my observations go, Cys are completely arboreal here.

[[margin]] Gen Baru Gloriss [[/margin]]  Incidentally, the northern end of the Western Cordillera, at least on the eastern slopes, must be drier on the average, than the southern end.  Vide the presence of Barus near Antióquia.  This would explain why Bruns occur in the northern end, and why Gloriss's are more common (presumably) there than elsewhere.

[[margin]] Scan [[/margin]]  1:35 p.m.  See a Scan attack and chase a House Wren in a fuchsia bush in the garden.  So the Scans here show inter-specific aggression too.  Perhaps the presence of the Scans here is what is keeping other hummingbirds out of the garden most of the time?  I wonder why I haven't seen Scans fighting with Diglossines outside of Colombia?  I surely couldn't have overlooked it if it was at all common.