F song(s) as male arrived @ nest site @0701hr "chick-a-dee", G song(s) best at 0605 (0715 hr), F song(s) of male to 1004m, then, F call(s) female "variable sees" as left nest & ? Copulation, F song(s) male at 1138, also, F call(s) "see-see's" at 0925 &1138