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[[underline]] Diglossopis [[/underline]], May 23, 1962, VI. [[circled]] 13 [[/circled]]

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[[underline]] imas [[/underline]] sings 1 or 2 more phrases. So it is possible that the sound of the songs of one species inhibits birds of the other species, when it does not stimulate them to sing in return. In any case, the songs of the 2 species do not overlap in a random manner.

4:25 pm. C(s) singing as usual. Then shut up. Then 1 ♂ [[underline]] aterrima [[/underline]] starts to sing. Then 1 of the C's starts to sing antiphonally with [[underline]] aterrima [[/underline]]. Then there is a brief overlap one song phrase of each species. Then both fall silent.

 [[three lines and star line on left margin]] Then the C's go to feed in an eucalyptus tree. Far apart in tree. Both sing. Songs of presumed ♂ longer and louder than those of presumed ♀. Then pres ♂ flies about 20 ft away, to feed in shrub. Utters 6 or 7 loud "Seeet"s in flight. (I am now beginning to return to the idea that these are PN's.) Two C's continue to sing. More or less antiphonally. Some overlap. pres. ♀ apparently following (in the sense of beginning to sing) after the pres. ♂. Then ♂ flies back to ♀. Does 
[[underline]] not [[/underline]] utter "Seeeet"s as he does so Lands right beside ♀. A loud "greeting" song as he lands. All or most of the "greeting"  by the ♂. Then both fly off. Silently.

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Then the same ♂ [[underline]] aterrima [[/underline]] utters a few more song phrases!

I should mention that the inhibition of song between [[underline]] aterrima [[/underline]] and Diglossopis seems to be mutual. One species starts [[underline]] after [[/underline]] other stops. Neither "cuts off" the song of the other.

[[underline]] squiggle in left margin [[/underline]] Incidentally, the Diglossopis were definitely feeding on insects while they were in the eucalyptus during this last incident. Poking at the bases of leaves, under hanging strips of bark, at the crotches of twigs, etc.
 
[[strikethrough]] squiggle in left margin [[/strikethrough]] As far as I know I have never seen any of the "Diglossini"