Spatial distribution of the YHK-selected galaxies in the GOODS fields (GOODS1+GOODS2). We also indicate with open circles the 6 r-YHK and 12 b-YHK galaxies, spectroscopically confirmed members of the overdensity at z ~ 1.6 reported by Kurk et al. (2009), symbols colours accounting for the object spectral class (see Fig. 6, lower panel). Three b-YHK galaxies confirmed at z ~ 1.6 from the ESO GOODS spectroscopy are also indicated by black squares.