Lindblad diagram for all six groups retrieved from the HC, ordered by descending median metallicity 〈[Fe/H]〉. A vertical dashed line is depicted at 〈L_z〉= 0, which denotes the stars with retrograde orbits around the Galactic centre. Stars with 〈L_z〉 between 1 and 3 show stars that are probably well constrained within the MW’s disc, whereas those with 0 ≤ 〈L_z〉< 1 have a higher probability of not being part of the disc, and those with 〈L_z〉< 0 probably come from the MW’s halo. A uniform range is maintained on both the x and y-axes, serving to direct the reader’s attention towards outliers manifesting within lower metallicities. The colour scheme remains consistent with the preceding figures.