Categories David Cinnabar moth caterpillars eating groundsel Post author By David Post date 9 August 2017 Two cinnabar moth caterpillars eating avidly at a groundsel plant. Groundsel is related to the ragworts. Like them it has noxious alkaloids to discourage predators, recycled by the moths to repel its own would-be predators. ← Artichoke flowering → Bell-flowered clematis flowers