Anthyllis species are used as food plants by the larvae of some Lepidoptera species including the following case-bearers of the genus Coleophora: C. acanthyllidis, C. protecta (both feed exclusively on A. tragacanthoides), C. hermanniella (feeds exclusively on A. hermanniae), C. vestalella (feeds exclusively on A. cytisoides) and C. vulnerariae (feeds exclusively on A. vulneraria).
The south facing slope of the Knoll has seen sightings of the Small Blue butterfly and its sole larval foodplant Kidney Vetch Anthyllis vulneraria grows there.