Helm's butterfly
 Helm's butterfly or the forest ringlet butterfly Dodonidia helmsii is a rare butterfly of the family Nymphalidae endemic to New Zealand. It is the only species in the genus Dodonidia. It feeds on Gahnia spp. and is found mainly in beech (Nothofagus spp.) forest. It has become more endangered due to the rarity of its food plant and the introduction of predatory wasps to New Zealand that prey on their larvae.