Thailand, Malaysia & Borneo
Forest Bush Brown
Family - NYMPHALIDAE
subfamily - SATYRINAE
Tribe - MYCALESINA
Mycalesis orseis nautilus,
Taman Negara, West Malaysia ©
Mycalesis is one of
the largest Satyrine genera, comprising of 88 known species, of
which 2 have yet to be given scientific names. The genus is confined
to the Oriental and Australian regions.
The butterflies are
instantly recognisable as a group, all being some shade of brown on
both wing surfaces, and marked with a series of conspicuous ocelli,
and a single straight median line across the underside of both
wings. Many of the species are very similar, but can usually be
distinguished from each other by close examination of the
configuration of the ocelli and submarginal lines.
Mycalesis orseis is found in India,
Myanmar, Thailand, West Malaysia, Singapore, Sabah, Sarawak, Brunei,
Kalimantan, Sumatra and Palawan ( Philippines ).
The butterfly is
quite easy to distinguish from other Mycalesis
species due to the yellow-ringed and evenly sized ocelli, pale
yellowish serrated submarginal line, and the faint hint of purple in
the white median band.
species is found in open areas of primary rainforest, mainly along
the narrow forest trails, at elevations between sea level and about
The lifecycle does
not appear to be recorded, but it can be assumed that the egg will
be spherical, white or yellowish in colour and glossy. The larva is
likely to be greenish or brownish in colour, with a dark head which
bears a pair of short horns. It will feed nocturnally on either
grasses, sedges or bamboos. The pupa will be of the usual plump
Satyrine shape, probably pale green, and unmarked except for minor
striations or dots. It will probably be suspended from a stem or the
underside of a leaf in the vicinity of the foodplants.
The butterflies tend to be found along narrow
trails at spots where dappled sunlight penetrates to ground level.
They fly infrequently and always keep low to the ground, settling on
dead leaf litter rather than living foliage.
flight is slow, bobbing and erratic, as is typical of Satyrines. I
have not observed nectaring or mud-puddling in this species.