of the old oak and sang full song, alternating with periods of preening and stretching. Whenever another bird flew near, it would crouch down and lower its head and tail to the same horizontal line with irs back. Finally it plunged down into the thick growth about 100 feet away. As I had not been able to identify the bird, I spent 15 minutes following the bird about (instead of going to the nest to find out which one it was by elimination) trying to get it to come to me, but it was indifferent. At last it condescended to come and get a worm from my hand and it was Green-eyes. This bird has, therefore, at least twice, been seen to sit in high places and sing full song. While it is much more timid than its mate, as regards approaching me, it seems also that it is more independent and indifferent. To date its "sun-fits" have been the more grotesque and prolonged; one yester- day lasting perhaps 15 minutes. Part of this time one wing was held stretched straight up above it. I built a staging this morning so as to be able to get still closer to the nest and have a more comfortable position. The work required a lot of digging, hammering, sawing, moving of small branches and so forth, very close to the nest. This did not seem to bother the birds much, but when the job was finished and I went up and offered the occupant of the nest a worm, it would only look sour. When I began snipping off twigs within an inch or two of its head, that was the last straw, and the bird slipped away. I don't blame it. This was followed by some scolding below and musical notes; Green-eyes appearing to have a good sun-fit and Brown-eyes coming to the nest with a large angle- worm dangling from her beak. This she "offered to the eggs" as her mate had been seen to do, then ate it herself. It almost looks as if the action were in some way connected with prospective hatching. Presumably the birds have no accurate measure of the time required for incubation, but their actions give the impression of some realization of the normal period's being about finished, hence the return to the nest prepared.