Metallicity of the host of GRB 080605 (star). Other GRB host metallicities are shown with black circles and upward/downward triangles as compiled and in the scale of Savaglio et al. (2009) (top panel) and Mannucci et al. (2011) (bottom panel). Field galaxies are shown as gray dots (Savaglio et al. 2005; Pérez-Montero et al. 2009; Mannucci et al. 2009; Hayashi et al. 2009; Richard et al. 2011), and in similar metallicity scales as the GRB measurements. Absorption metallicities from GRB afterglows (Rau et al. 2010; D’Elia et al. 2010; Savaglio et al. 2012; Thöne et al. 2012, and references therein) and QSOs (Prochaska et al. 2003) are plotted as black and gray diamonds, respectively. Errorbars for individual events in the comparison samples are omitted to enhance clarity. The error bars at the bottom right corner of each panel illustrate uncertainties of 0.2 dex, which are typical for both, GRB-DLA (e.g., Rau et al. 2010; Thöne et al. 2012) and GRB host metallicity (e.g., Mannucci et al. 2011) measurements.