FIG. 1 is a perspective view of a single unit swan fence, showing my design;
FIG. 2 is a front elevational view of the single unit swan fence of FIG. 1;
FIG. 3 is a top elevational view of the single unit swan fence of FIG. 1;
FIG. 4 is a left side elevational view of the single unit swan fence of FIG. 1;
FIG. 5 is a right side elevational view of the single unit swan fence of FIG. 1; and,
FIG. 6 is a bottom view of the single unit swan fence of FIG. 1.
Vertical posts shown in phantom in FIGS. 1-6 are not part of the claimed design.