Comparison of average HI content between SFGs and QGs. The solid purple line represents the M_HI − M_⋆ scaling relation for SFGs from B25. Blue circles show HI masses from color-selected QGs in two stellar mass bins: a circle at the high-mass end (significant detection) and a triangle at the low-mass end (upper limit only). Red squares indicate HI masses from stacked spectra of dusty, spectroscopically selected QGs in two mass bins. A gray triangle marks the upper limit from stacking non-dusty, spectroscopically selected QGs.