I claim the ornamental design for a squirrel-proof bird feeder pole, as shown and described.
FIG. 1 is a first perspective view of a squirrel-proof bird feeder pole showing my new design;
FIG. 2 is a second perspective view thereof;
FIG. 3 is a front elevation view thereof, the back elevation being a mirror image;
FIG. 4 is a left-side elevation view thereof, the right-side elevation being a mirror image;
FIG. 5 is a top plan view thereof;
FIG. 6 is a bottom plan view thereof; and,
FIG. 7 is another front view thereof, but shown in a usage state in an environmental view.
The broken lines shown in FIGS. 2 and 6 illustrate portions of the squirrel-proof bird feeder pole, and the broken lines shown in FIG. 7 illustrate environmental structure. All broken lines form no part of the claimed design.