FIG. 1 is a front elevational view of a spiral windcatcher showing my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a sectional view taken in the direction of arrows along line 3--3 of FIG. 1; and,

FIG. 4 is a sectional view taken in the direction of the arrows along line 4--4 of FIG. 1.

While FIG. 2 is randomly showing a grid type surface on some of the individual elements of the claimed design, it is understood that this surface continues over the entire structure.