Radial action vs. angular momentum (J_R, L_z) distribution of field stars closer than 200 pc in Gaia DR2/RVS sample (grey), and clusters (coloured dots by the density of points). Each column shows clusters in different age bins, and each row includes clusters selected inside different ranges of Galactocentric radius, instead of heliocentric distances. We indicate the approximate location of the known moving groups analysed by Trick et al. (2019): Hercules (green and blue), Pleiades (dark violet), Hyades (magenta), Coma Berenices (red), and Sirius (yellow). We highlight the values of the three clusters Pleiades, Hyades, and Coma Berenices with a violet (second column in the bottom row), pink, and red star (both in the last column of the bottom row), respectively, in their age-R_GC panels.