- Common Name : Common Raven
- Scientific Name : Papilio castor (Westwood)
- Family : PAPILIONIDAE
- Wingspan : 100-130mm
- Colour : Being tailless, this dark butterfly is deceptively similar to the Crows and Mimes.
- Habit : Seen in summer and in July and August upto 1200m in the hills. Prefers evergreen forests of heavy rainfall areas. Fast flier.
- Larval Host Plants : Gycosmis arborea, Toddalia asiatica, Glycosmis pentaphylla
- Location : North Bengal