_Behavior._--The magnolia warbler is not only one of the most beautiful--to my mind, the most beautiful--of wood warblers, it is one of the most attractive to watch. It frequents, especially on its breeding grounds, the lower levels in its forest haunts, where it can easily be seen. It is most active and sprightly in its movements as it flits about in the small trees or bushes, with its wings drooping and its tail spread almost constantly, showing the conspicuous black and white markings in pleasing contrast with the brilliant yellow breast, the gray crown, and the black back; it seems to be conscious of its beauty and anxious to display it. Its rich and vivacious song, almost incessantly uttered during the early part of the nesting season, attracts attention and shows the nervous energy of the active little bird. It is not particularly shy and is quite apt to show itself at frequent intervals, as if from curiosity. The female sits closely on her nest until almost touched, and then slips quickly off to the ground and disappears. But both of the parents are devoted to their young and quite bold in their defense, as mentioned above by Miss Stanwood. At the nest that Mrs. Nice (1926) was watching the warblers paid no attention to a red squirrel that several times came within 15 feet of the nest. "In general the relations of these warblers with other birds was not unfriendly; no attention was paid to passing Chickadees nor to Chewinks and Maryland Yellow-throats that nested near. The only birds towards whom the male showed animosity were a male Myrtle Warbler that he drove away both during incubation and while the young were in the nest, and the male of his own species who came to call July 2. On July 8 the female warbler gave short shrift to an inquisitive female Black-throated Green Warbler that seemed to wish to inspect the household." The intimate studies made by Mrs. Nice and Henry Mousley indicate that these warblers will tolerate a reasonable amount of human intimacy without showing too much timidity. _Voice._--My earliest impression of the song of the magnolia warbler was written in 1891 as _wee-chew, wee-chew_ in full, rich notes. Later I attempted to syllabilize it quite differently; once I wrote it _switter, switter, swirr_, or _swicher, swich, a-swirr_. On another occasion it sounded like _wheet, tit, chéw_, or _wheet, wheet, tit, chéw_. Mrs. Nice (1926) noted only two songs, "the day song and perch song _weechy weech_ and the feeding and vesper song _sing sweet_ with its variation _sing sing sweet_. He used three different notes: _tit_ the alarm note, _kree_ the love note, and _eep_, the significance of which I never fathomed." Gerald Thayer wrote to Dr. Chapman (1907):