Density map of two peculiar overdensities. The structures at z = 3.17 in the CDFS is shown in the leftpanel, the structures at z = 2.33 in the UDS is shown in the rightpanel. Red diamonds correspond to the spectroscopic members within the lowest redshift peaks, blue diamonds to the intermediate redshift peaks, green diamonds to the highest redshift peaks as seen in Fig. 6 and explained in the text.