Heat map representing the predicted pulsation fraction for all A and F stars from Murphy et al. (2019). The black dots are Am and Fm stars found to exhibit δ Sct pulsations, while the those without known pulsations are shown in light grey. The white contours indicate the observed Am and Fm star pulsator fraction. Theoretical instability strip boundaries from Dupret et al. (2004), for α = 2, are show as dashed lines, while the red-edge given by Murphy et al. (2019) is shown as a solid red line. The typical uncertainties for T_eff and luminosity are the same as in the previous figures.