Arctia testudinaria, or Patton's tiger, is a moth of the family Erebidae. It was described by Geoffroy in 1785. It is found from northern Spain to southern and central France and southern Switzerland to north-eastern and southern Italy. It has also been recorded from Great Britain.[1] The habitat consists of grasslands, slopes, forest edges, clear dry forests, cliffs and mountain slopes, maquis, garrigues and dry meadows.[2]
The wingspan is 35–45 mm.[3] Adults are on wing in May and July.
The larvae feed on various low-growing plants, including Plantago, Rumex, Achillea, Euphorbia cyparissias, Potentilla, Hieracium, Taraxacum, Cynoglossum, Deschampsia, Calamagrostis.[4] The species overwinters in the larval stage. Pupation often takes place under flat stones.
This species, along with the others of the genus Hyphoraia, was moved to Arctia as a result of phylogenetic research published by Rönkä et al. in 2016.