The ornamental design for a birdprotector, as shown and described.
FIG. 1 is a top plan view of a bird protector showing my new design; and,
FIG. 2 is a bottom plan view thereof.
The long dashed/short dashed lines visible in FIG. 1 are part of the claimed design.
The vertical and horizontal lines within the circular areas of FIG. 1 represent a contrasting appearance.
The straps depicted by broken lines in FIGS. 1 and 2 are shown for the purpose of illustrating portions of the bird protector that form no part of the claimed design.
It is understood that the claimed bird protector is of no appreciable thickness.