Among the birds which are endowed by Nature with the gift of song in connection with gaudy plumage is the American Goldfinch, or Hemp-bird, (_Fringilla tristis_,) one of the most interesting and delicate of the feathered tribe. Of all our birds this bears the closest resemblance to the Canary, both in his plumage and in the notes of his song. He cannot be ranked with the finest of our songsters, being deficient in compass and variety. But he has great sweetness of tone, and is equalled by few birds in the rapidity of his execution. His note of complaint is exactly like that of the Canary, and is heard at almost all times of the year. He utters also, when flying, a very animated series of notes, during the repeated undulations of his night, and they seem to be uttered with each effort he makes to rise.
It is remarkable that this bird, though he often rears two broods in a season, does not begin to build his nest until July, after the first broods of the Robin and the Song-Sparrow have flown from their nests. Mr. Augustus Fowler[2] is of opinion, from his observation of their habits of feeding their young, that the cause of this procrastination is, "that they would be unable to find, in the spring and early summer, those new and milky seeds which are the necessary food of their young," and takes occasion to allude to that beneficent law of Nature which provides that these birds "should not bring forth their young until the very time when those seeds used by them for food have passed into the milk, in which state they are easily dissolved by the stomach, and when an abundant supply may always be found."
The Hemp-birds are remarkable for associating at a certain season, and singing, as it were, in choirs. "During spring and summer," says Mr. Fowler, "they rove about in small flocks, and in July will assemble together in considerable numbers on a particular tree, seemingly for no other purpose than to sing. These concerts are held by them on the forenoon of each day, for a week or ten days, after which they soon commence building their nests. I am inclined to believe that this is their time of courtship, and that they have a purpose in these meetings beside that of singing. If perchance one is heard in the air, the males utter their call-note with great emphasis, particularly if the new-comer be a female; and while in her undulating flight she describes a circle, preparatory to alighting, they will stand almost erect, move their heads to the right and left, and burst simultaneously into song."