Bugs & Butterflies UK
White Helen Swallowtail | Papilio nephelus PUPAE
White Helen Swallowtail | Papilio nephelus PUPAE
Papilio nephelus, commonly known as the White or Yellow Helen (depending on subspecies), is a striking butterfly species belonging to the swallowtail family (Papilionidae). It is native to South and Southeast Asia, found in countries such as India, Sri Lanka, Myanmar, and parts of Indonesia. Known for its elegance and large size, the Yellow Helen is often spotted in forests, gardens, and near water sources.
This butterfly’s wings are primarily black with yellowish or white patches on the hindwings, which serve as its distinguishing feature. The hindwings also have a scalloped edge and are adorned with subtle red spots near the base. Like many swallowtails, Papilio nephelus has tail-like extensions on its hindwings.
The caterpillars are green and mimic bird droppings in their early stages for camouflage, eventually transitioning into more vibrant hues as they mature. They feed on host plants including members of the Rutaceae family such as citrus trees.
The adult butterflies are avid nectar feeders, often seen fluttering around flowers in search of sustenance. While not endangered, Papilio nephelus faces threats from habitat destruction. Preserving its forested habitats is essential for maintaining its population and ecological role as a pollinator.
Difficulty - Easy (2/10)
Host plants - Citrus; various other related plants.
Conditions - Room temperature is sufficient however pupae emerge sooner with warmth & butterflies enjoy sunshine.
Lifecycle - Continually brooded; pupae capable of diapause.