- Common Name : Spangle
- Scientific Name : Princeps protenor (Fruh.)
- Family : PAPILIONIDAE
- Wingspan : 100-140mm
- Colour : Upperside is velvety indigo-blue black, duller on the fore wing than on the hind wing. Fore wing underside is dull black.
- Habit : Primarily a forest butterfly. Flies in a leisurely manner keeping close to the undergrowth, fond of damp patches, visits flowers and gardens.
- Larval Host Plants : Zanthoxylum sp. and Citrus sp.
- Location : North Bengal