Common Grass Blue
(often misidentified as Zizina otis)
POLYOMMATINI , POLYOMMATINAE , LYCAENIDAE , PAPILIONOIDEA
These Caterpillars begin life as single bluish toroidal eggs. These are laid on the leaves of a foodplant, which can be various members of FABACEAE, such as:
In summer in Melbourne, eggs that we collected hatched in three days from being laid.
The Caterpillars themselves are green slug-like creatures, with short white hairs, and a thin yellow stripe along each side of the body, and a darker green line down the back. The head is brown or black, although it is normally cannot be seen as the Caterpillar holds it tucked under the thorax. The Caterpillars grow to a length of 0.7 cms. This makes them hard to find, especially as they rest by day at the base of the foodplant.
The pupa is dirty pink, pale green, or pale yellow, with dark markings, and is attached to the undersurface of a leaf of its foodplant by tail and girdle.
The adult has a black body and the upper surfaces of the wings are purplish blue with a black termen.
The undersides are greyish blue with a fawn pattern of spots and stripes. The adults have a wingspan of about 2 cms. They normally fly very close to the ground.
The species is found over most of Australia, including:
Further reading :
Michael F. Braby,
Butterflies of Australia, CSIRO Publishing, Melbourne 2000, vol. 2, pp. 837-838.
Kelvyn L. Dunn,
New and overlooked distribution records for the Common Grass Bluee, Zizina otis labradus (Godart) (Lepidoptera: Lycaenidae), in eastern Australia,
Issue 72 (March 2014), pp. 18-26,
Butterflies and Other Invertebrates Club.
Jean Baptiste Godart,
Histoire naturelle Entomologie,
Volume 9, Part 2 (1874), p. 612, No. 197, and also p. 680, No. 197.
(updated 1 May 2010, 8 October 2016)