A wren built her nest in a box, so situated that a family had an opportunity of observing the mother bird instructing the young ones in the art of singing peculiar to the species. She fixed herself on one side of the opening in the box, directly before her young, and began by singing over her whole song very distinctly. One of the young then attempted to imitate her. After proceeding through a few notes, its voice broke, and it lost the tune. The mother immediately recommenced where the young one had failed, and went very distinctly through the remainder. The young bird made a second attempt, commencing where it had ceased before, and continuing the song as long as it was able; and when the note was again lost, the mother began anew where it stopped, and completed it. Then the young one resumed the tune and finished it. This done, the mother sang over the whole series of notes a second time with great precision; and a second of the young attempted to follow her. The wren pursued the same course with this as with the first; and so with the third and fourth. It sometimes happened that the young one would lose the tune three, four, or more times in the same attempt; in which case the mother uniformly began where they ceased, and sung the remaining notes; and when each had completed the trial, she repeated the whole strain. Sometimes two of the young commenced together. The mother observed the same conduct towards them as when one sang alone. This was repeated day after day, and several times in a day.