Description
This species is a new taxon to Singapore. Discovered early in October 2001, the species has since spread to many other parts of Singapore. Photographs of male and female specimens were sent to Col JN Eliot in London for verification, and it was confirmed that this species was indeed Zizeeria maha serica of which the type specimen originated from Hong Kong. Like the Cabbage White (Pieris canidia malayana), this species was probably introduced by human agency to Singapore. As it is an urban butterfly, preferring to fly in cultivated areas, the main threats to the existence of this species would be the spraying of pesticides and the clearance of weeds and grasslands in its preferred habitat.

The upperside of the male is light blue with broad dark blue borders, whilst the female is a dark greyish blue. The dark marginal spots on the hindwings above sets this species apart from the two similar small species, the Lesser Grass Blue (Zizina otis lampa) and the Pygmy Grass Blue (Zizula hylax pygmea). The more pronounced spots on the underside of this species, particularly the submarginal spots along both the wings also distinguishes it from the other species.

Habitat & Habits
The butterfly has a weak fluttering flight and can usually be found on sunny days at flowering weeds along drainage reserves and grasslands. The caterpillar of species has been bred on Yellow Sorrell.

Other Observations
To be detailed.

Early Stages
Refer to the ButterflyCirlce's blog article - The Life History of the Pale Grass Blue.

Further Reading
To be detailed.