Identification Characteristics:
The species is the only one of the Ixias genus found in Vietnam, with several subspecies. It is easily recognizable due to its distinctive coloration and size. The dorsal surface of the wings is yellow with a broad black border and a large orange area near the mid-section of the forewing. Females are duller in color and have a much smaller orange band compared to males. This species exhibits two distinct seasonal forms. The dry-season form is smaller, and the dorsal hindwing lacks a black border, while the ventral hindwing has brown spots with a white center. The female has a narrow yellow or slightly white band. Wingspan: 50 – 60mm.
Biology and Ecology:
When resting with their wings folded, this species may be superficially mistaken for Eurema species; however, it is easily differentiated by its much larger size. The underside of the wings also differs significantly upon closer observation, and the dorsal wing pattern is revealed during flight, making it easily identifiable. The species is frequently observed near water sources in forests, and may be abundant during the rainy season, coexisting with Appias and Cepora species. The larvae feed on the leaves of plants belonging to the genus Capparis sp., family Capparaceae. This butterfly is generally common in secondary lowland forests and less frequently found in deep forests (primary forests). The female lays eggs on plants belonging to the Capparaceae family.
Distribution:
Distributed from India through China to Thailand and Malaysia. It is found throughout Vietnam and is relatively common. It is found at altitudes below 1,200m in secondary forests, grasslands, and shrublands, being more abundant above 700m. They also inhabit primary forests at altitudes below 700m, but are rare there.
Species Name:
The species name is translated from English.
Value, Status, and Conservation:
Individuals of this species are less common than those of the Appias genera, but are not yet considered rare. They can be observed wherever there are trails within or near forests, and where there is ample sunlight during the summer, in warmer locations. However, this is a beautiful butterfly, with a special coloration and medium size within the Pieridae family. Given that there is only one species in the genus (with many subspecies), it is of significant value for taxonomic classification and biodiversity. In a collection, specimens are easily distinguishable from other species due to their characteristic colors. It is possible to breed this species in farms.