Hardness ratio vs. count rate in counts s^-1 for the hard X-ray WD symbiotics that have been observed with Swift. The new X-ray detected WD symbiotics are all located to the left of the dashed line, confirming that because of their low X-ray fluxes, they had not been detected before. The plot shows that δ-type sources (□) have a hardness ratio of more than 1 (above the dotted horizontal line); β-type sources (⋄) have hardness ratio of less than 1; and β/δ-type sources (△) are located above and below the hardness ratio =1 line. Hence, accretion-dominated δ-type objects lie above hardness ratio ≈1, while below this line we find soft X-ray sources whose X-ray spectra are dominated by emission originated in a colliding-wind region.