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[[circle]] 209 [[/circle]]

[[underline]] maculipennis [[/underline]], Dec. 25, 1955, VI

is opened widely during the shrill F notes, (and possibly the tail is not fanned - or, at least, fanned less widely).

Rhythm of "typical" L.C.'s might be represented as 

________ ________  __ __ __ or

___________ __ __ _ (I haven't indicated pitch in these diagrams, because it is difficult to distinguish in such peculiar, un-human-voice-like sounds. I suppose that the F notes might be shown as lower pitched than the O notes; but there is certainly nothing like an [[underline]] evenly [[/underline]] descending series of notes. All O notes same pitch; and all F notes the same pitch).

It is possible that some O's, particularly prolonged, may have 3 notes; but this is very rare - if it even does actually occur.

The overtly hostile semi-H or H postures, with R, with brief LCN notes ("LCN" in broad sense - including FB notes and shrill F notes - if any of these can be really distinguished from one another) are very reminiscent of the Andean Gull also.

[[underline]] maculipennis [[/underline]] December 27, 1955, Bay of Porvenir

A little pairing behavior on the beach in the rain. MC's of O -> F - > V&HF, and just V&HF.

After this the [[image - male symbol]] flew up, chased another bird in a redirected pursuit flight performance. Rapid horizontal chase by pursuer, giving LCN's, notes intermediate between LCN and Attack Call Notes, then an Attack Call Note. Followed by very short Swoop, and a moderately short Soar (at first flying, then gliding). Attack Call Note continues into the Swoop, LCN's during first part of Soar, silent during last part of Soar. (The simple, silent, nature of this Swoop and Soar probably does