Study of the Neptunian desert boundaries for FGK planet hosts versus M dwarf hosts in period-radius space, as described in Section 6. Our planet sample (Table E.1; Fig. E.1) is shown as coloured dots, according to the weighting of each planet. In the top panel, our full planet sample is shown (where M dwarf hosts are highlighted with black outlines). The middle panel shows planets around FGK hosts only, and the bottom panel shows planets around M dwarf hosts. The boundaries of the bins in radius space are depicted with dashed lines and the bins are numbered 1-8 in the top panel. The period percentile values calculated for each bin and their errors are shown. The 2.3-97.7 percentiles are shaded in light grey, while the 16-84 percentiles are shaded in dark grey.