~ 10° × 10° of the region surrounding Hoinga as seen by GLEAM at 103-134 MHz (R), 139-170 MHz (G), and 170-200 MHz (B). Left panel: image from the data release of Hurley-Walker et al. (2017), and right panel: region after reprocessing to subtract sources and highlight large-scale structure (see Sect. 3.1). Hoinga is visible as an ellipse in the centre of the image; steep-spectrum Galactic cirrus becomes a strong contaminant at these low frequencies and is visible as large-scale filaments around the remnant. The bright source in the northwest is Hydra A.