actual range. Museum specimen records identified it as active from 27 December to 11 March. It is known to be able to remain aloft for long periods of time and to cover great distances. Similar species Butler's ringlet appears very similar to some species of the genus Erebia, and was included in that genus until 1967, when Erebia butleri was reclassified as Erebiola butleri due to structural differences found between butleri and other members of the genus Erebia. Butler's ringlet is visually similar to the black mountain ringlet, Percnodaimon pluto. The two species may be differentiated by where the individual in question is sighted. Butler's ringlet prefers to fly over vegetation, settling among snow-tussock, subalpine shrubs and herbaceous flowers, whereas the black mountain ringlet tends to congregate over rock and scree. See also Butterflies of New Zealand References Satyrini Taxa described in 1879 Monotypic butterfly genera Taxa named by Richard William Fereday