We claim the ornamental design for a decoy stand, as shown and described.
FIG. 1 is a front perspective view of a decoy stand in accordance with the invention.
FIG. 2 is a front view of the decoy stand of FIG. 1.
FIG. 3 is a rear view of the decoy stand of FIG. 1.
FIG. 4 is a top view of the decoy stand of FIG. 1.
FIG. 5 is a bottom view of the decoy stand of FIG. 1.
FIG. 6 is a right-side view of the decoy stand of FIG. 1; and,
FIG. 7 is a left-side view of the decoy stand of FIG. 1.
The portions of the decoy stand shown in broken lines are included for the purpose of illustrating environment and form no part of the claimed design. The portions of the decoy stand shown in broken lines having unequal length segments illustrate the boundary of the claimed design and form no part of the claimed design.