The ornamental design for a birdfeeder, as shown and described.
FIG. 1 is an isometric view taken from the top, one end and one side of a
bird feeder showing my new design;
FIG. 2 is an elevational view taken from the end opposite that shown in
FIG. 1, a portion of the top being broken away for convenience of
illustration; and
FIG. 3 is an elevational view taken from the side opposite that shown in
FIG. 1, a portion of the bottom being broken away for convenience of
illustration, the bottom being plain and unornamented.