Brightness and redshift distribution of the galaxies in our sample. Magnitudes are primarily measured in the R/r filter (94% of the sample). For the remaining hosts, V or I/i-band magnitudes are shown. Upper limits come from events for which the spectral continuum was dominated by a bright afterglow, they are denoted by downward triangles and are not included in the brightness histogram. Galaxies that hosted dusty GRBs (sightline ) are indicated by red stars and red-filled histograms.