Bird feeder base

[0001]FIG. 1 is a top, front, right side perspective view of a bird feeder base showing our new design;

[0002]FIG. 2 is a bottom, rear, left side perspective view thereof;

[0003]FIG. 3 is a front elevation view thereof;

[0004]FIG. 4 is a rear elevation view thereof;

[0005]FIG. 5 is a left side elevation view thereof;

[0006]FIG. 6 is a right side elevation view thereof;

[0007]FIG. 7 is a top plan view thereof;

[0008]FIG. 8 is a bottom plan view thereof; and,

[0009]FIG. 9 is an enlarged view of detail “9” (identified in FIG. 1), shown at a greater scale for clarity of disclosure.

[0010]The broken lines shown in the drawings depict portions of the bird feeder base that form no part of the claimed design. The dot-dash broken lines represent boundaries of the enlarged portions and form no part of the claimed design.