Categories DavidCinnabar moth caterpillar Post author By David Post date 20 August 2011 The cinnabar moth is a brightly-coloured, day-flying moth. Like its caterpillar it is brightly coloured, to advertise that it is poisonous. The poisons are absorbed from ragworts, the home and food of the caterpillar. ← River Severn at Severn Valley Country Park footbridge → Heather on a heathy section of Sutton Park