I observed that they now and then stood in a stiffened attitude, balancing their body from side to side on the joint of the tarsus and toes, as on a hinge, but could not discover the import of this singular action. During the love days of the pair mentioned above, the male would spread its little wings and tail, and strut in short circles round the female, pouring out a low warble so sweet and mellow that I can compare it only to the sounds of a good musical box. The female received these attentions without coyness, and I have often thought that these birds had been attached to each other before that season.
No name could have been imposed upon this species with more propriety than that of the Warbling Flycatcher. The male sings from morning to night, so sweetly, so tenderly, with so much mellowness and softness of tone, and yet with notes so low, that one might think he sings only for his beloved, without the least desire to attract the attention of rivals. In this he differs greatly from most other birds. Even its chiding notes—tschĕ, tschĕ, were low and unobtruding. The nestlings uttered a lisping sound, not unlike that of a young mouse. The only time I saw the old birds ruffled, was on discovering a brown lizard ascending their tree. They attacked it courageously, indeed furiously, and although I did not see them strike it, compelled it to leave the place.
The flight of the Warbling Flycatcher is performed by gentle glidings, and seldom extends to a greater length than a hundred yards at a time. I never saw it on the ground.
It was never observed by me in Louisiana or Kentucky, nor does it pass along the maritime districts of Georgia or the Carolinas; but from Virginia to Maine it is not uncommon, although I saw none farther north. It arrives in the Jerseys and Pennsylvania about the first of May, some years perhaps a little earlier, and proceeds farther east as the season advances. I do not think that it raises more than one brood each season, although I have observed it as late as the 15th of October in the Middle Districts, where I believe the greater number of these birds spend the summer. Not one could I see during the winter in the Floridas, where, however, the White-eyed and Red-eyed Flycatchers were frequently heard in full song.
Vireo gilvus, Ch. Bonaparte, Synops. of Birds of the United States, p. 70.
Warbling Flycatcher, Muscicapa melodia, Wils. Amer. Ornith. vol. v. p. 85. pl. 42. fig. 2.
Warbling Vireo, Nuttall, Manual, vol. i. p. 309.
Adult Male. Plate CXVIII.
Bill rather short, depressed at the base, subtriangular, compressed toward the tip, acute; upper mandible with the sides convex, notched towards the end, and deflected at the tip. Nostrils basal, lateral, oblong. Head rather large, neck short, body ovate. Feet of ordinary length; tarsus compressed, anteriorly scutellate, sharp behind; toes slender, free; claws small, slightly arched, compressed, acute.
Plumage soft and blended. Wings of ordinary length, the second and third primaries longest, first and fifth about equal. Tail of ordinary length, slightly emarginate. Basirostral bristles rather short.