[OI] 63.18 μm flux versus: IRAC 3.6 μm (top left); IRAC 8.0 μm (top right); MIPS 24 μm (bottom left); and PACS 70 μm (bottom right) continuum fluxes. Class I, Class II, Class III, and transition discs (TD) are represented by circles (blue), squares (red), asterisks (black), and stars (green), respectively. Filled symbols corresponds to outflow sources. Arrows indicate upper limits. The dashed lines are 1:1 relations and the solid line is a fit to disc sources as explained in the text.