[Illustration: Musical staff] Tu lu lu, tu lu lu, tu lu lu, too loo.

NOTE.—The Robin is continually varying his notes; so that the two specimens, as given above, may be considered but the theme upon which he constructs his melody.

SONG OF THE WARBLING VIREO. (V. Gilvus.)

[Illustration: Musical staff] Brigadier Brigadier Brigadier Briget.

SONG OF THE RED-EYED VIREO. (V. olivaceus.)

[Illustration: Musical staff] pauses to Take a fly.

[Illustration: Musical staff] takes another, The same repeated without conclusion.

SONG OF THE GOLDEN ROBIN. (Icterus Baltimore.) [Illustration: Musical staff]

[Footnote 1: Mr. Charles S. Paine, of East Randolph, who, I believe, was the first to observe this habit of the Song-Sparrow.]

[Footnote 2: Mr. Augustus Fowler of Danversport, who has made one of the finest collections of the eggs of native birds. His drawings of the same are beautifully executed, accompanied by representations of the nests and of the foliage that surrounded them. This gentleman and his brother, Mr. S.P. Fowler, have found leisure, during the intervals of their occupation in a mechanical art, to acquire a knowledge of certain branches of natural history which would do honor to a professor.]