Stygionympha robertsoni

Stygionympha robertsoni, or Robertson's brown, is a butterfly of the family Nymphalidae. It is found in South Africa, in Northern Cape, the southern part of Free State, the northern part of Western Cape and the Eastern Cape.

Stygionympha robertsoni
Scientific classification
Kingdom:	Animalia
Phylum:	Arthropoda
Class:	Insecta
Order:	Lepidoptera
Family:	Nymphalidae
Subfamily:	Satyrinae
Tribe:	Satyrini
Genus:	Stygionympha
Species:	S. robertson
Binomial name
Stygionympha robertson (Riley, 1932)[1]
Synonyms
Pseudonympha vigilans robertsoni Riley, 1932

Description

The wingspan is 38–40 mm. Adults are on wing from August to March. There are probably multiple generations per year.^[2]

Individuals based in Witsand feature darker coloration that the specimens from other regions like Free State.^[3]

Habitat and behavior

The larvae feed on Poaceae grasses. Larvae have also been reared on Ehrharta erecta.^{[citation needed]}