The roller canary is bred primarily for song, hence the form, feather,
size, and substance of this roller makes it most exceptional. Most
rollers are no more than five inches in length, with a much flatter
appearing head and straighter back and are lacking in the solid girth of
this bird. With the advent of color breeding, many of the foremost U. S.
roller fanciers are experimenting with color, size, and form
improvements, as shown in this advanced type. PLATE 1