Demetrius Swallowtail
Common NameDemetrius Swallowtail
Scientific NamePapilio demetrius
FamilyPapilionidae
SubfamilyPapilioninae
Wingspan (mm)100
Primary Colorsblack, dark blue, white
HabitatTropical and subtropical forests, woodlands, gardens, citrus groves
Geographic RangeSoutheast Asia (e.g., Sumatra, Java, Borneo, Peninsular Malaysia)
Host PlantsCitrus spp., Euodia spp., Zanthoxylum spp.
Flight PeriodYear-round (multiple broods)
Conservation Statusleast-concern
Lifecycle NotesUndergoes complete metamorphosis. Eggs are laid singly on host plants. Larvae are typically green with cryptic patterns, pupating into a chrysalis that often mimics a twig.
Identification TipsKey features include its large size, overall dark coloration, and the distinct white band on the hindwings. The forewings have fine, parallel lines.
Description
A large, dark swallowtail butterfly with predominantly black or very dark blue wings, featuring a prominent white band across the hindwings. The forewings display subtle striations.
