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Mixed Diglossini, Mar. 8, 1966, VII. [[cirlcled]] 19 [[/circled]] [[margin]] Ater [[/margin]] [[underlined]] must be a very high intensity boundary dispute. And it is very interesting that it is [[double underlined]] not [[/double underlined]] accompanied by more elaborate display [[/underlined]] !!! As far as I can tell, all the birds are silent. (But there is a torrent near by and I might not hear soft or medium sounds.) One or more of the inds. showed a trace of TV with Belly-fluffing, two or three times, but nothing more. Eventually the birds separate. A pair going in one direction and a single ind. in another. [[margin]] Ater [[/margin]] NOTE: All the birds involved in this dispute (and all other Aters seen so far) were adult. This is evidence that Ater pairs are [[underlined]] not [[/underlined]] usually composed of one adult and one juvenile. [[margin]] Lerbia [[/margin]] During the dispute, a single green hummingbird with a long tail (presumably [[underlined]] Lerbia [[/underlined]]) came and sat about 8 ft from the combatants for a minute or so. No overt reaction between the 2 species. Then the hummer flew away. [[margin]] Scan [[/margin]] Later, a single Scan flew over the combatants (about 6 ft up). No Swoop or any other overt reaction between the two species. [[margin]] Ater Scan [[/margin]] Some time after the fight, one of members of the Ater pair landed in bush about 3-4 ft from perched Scan. Again no overt reaction. [[margin]] Scan [[/margin]] NOTE: There are [[underlined]] at least [[/underlined]] 3 Scan inds. in this immediate area. [[margin]] Scan [[/margin]] 8:55. Scan Singing again. NODWAH [[margin]] Cinn [[/margin]] Walking along path, see more single Cinns and ^[[2 checkmarks]] Aters alone [[margin]] Ater [[/margin]] NOTE: [[underlined]] Territories of Aters, Cinns, and Scans here must be completely overlapping in at least some cases. [[/underlined]] [[margin]] Scan Ater [[/margin]] 9:00 a.m. Scan stops Singing [[underlined]] Immediately [[/underlined]], I hear some Ater Twitters!!! Ater stops. [[underlined]] Immediately [[/underlined]], Scan resumes Scan stops.