Tailed radio source, T3266, NW of the centre of MCXC J0431.4−6126 (Abell 3266), which may be an extremely unusual composite of two independent sources. Top left: full-resolution (7.1″ × 6.7″) MGCLS Stokes-I intensity of the source (orange) overlaid on a DECam g-band image (blue). The radio brightness is on a non-monotonic scale, with the faintest regions of the tethers at ∼0.15 mJy beam⁻¹ and the brightest regions at 2.2 mJy beam⁻¹. Circles, labelled A and B, indicate the positions of the two likely host galaxies (see the right panels). The physical scale at the cluster redshift is shown in the lower left corner. Bottom left: in-band spectral index map, with a strong steepening with distance from host B. Right: DECam gri composite images of the two proposed hosts labelled A and B in the top left panel. Host A is at RA = 04^h31^m18.48^s, Dec = −61° 19′18.54″. Host B is at RA = 04^h30^m45.56^s, Dec = −61° 23′35.8″.