Erikssonia edgei

The critically endangered butterfly occurs in high-altitude grasslands on sandy substrates, and has only been obtained from the type and one subsequent locality.

The larvae feed on two species of Gnidia, both poisonous, and shelter by day in the nests of Lepisiota ants, wherein the pupae also develop.

When she encounters the food plant she uses her antennae to search for traces of the trail pheromones of the host ant.

They have pinkish grey bodies with a maroon line down the dorsum, flanked by bluish green and regular reddish brown markings on the sides.

They frequented 3 ha at the northwestern base of Perdekop, a peak on the edge of an expansive, level valley.

Its local extinction was ascribed to habitat changes induced by altered grazing and fire management practices.

[6] On 2 March 2013, Prof. Mark Williams and his spouse Tildie discovered two new colonies in a 5 ha area of the private Bateleur Nature Reserve, some 42 km southeast of the type locality.

Jeremy Dobson and Owen Garvie were assigned to implement a conservation plan for this new locality in the southeastern Waterberg.

[7] Vegetation at the new locality is treeless grassland, with the hitherto known larval host-plant, Gnidia kraussiana, present but uncommon.

Females were observed to lay their eggs at the base of Gnidia microcephala besides G. kraussiana, and the ant host appeared to be a Lepisiota species, as was the case at the type locality.