Typical stellar associations, their overlap with superbubble features, and their appearance using bubble 36 from NGC 1566 as an example (see blue box in Fig. 1, panel 2). Left: HST B-band image with 16 pc (black contours), 32 pc (red), and 64 pc (white) association catalogues overlaid. Right: CO T_peak map with the 32 pc associations overlaid coloured by their age. The filled translucent circle indicates the beam and the white line indicates a physical scale of 100 pc. The dashed orange and black circles show the bubble radius.