The wingspan is 10–11 cm. The wings are black and have large light pink spots. The underside of the wings are similar to the upside. The body is partially black with a covering of red hairs underneath.
No data on conservation status; more research needed.[4] Subspecies B. i. febanus is sometimes accepted as a separate species.
References
^Häuser, Christoph L.; de Jong, Rienk; Lamas, Gerardo; Robbins, Robert K.; Smith, Campbell; Vane-Wright, Richard I. (28 July 2005). "Papilionidae – revised GloBIS/GART species checklist (2nd draft)". Entomological Data Information System. Staatliches Museum für Naturkunde Stuttgart, Germany. Archived from the original on 9 September 2010. Retrieved 21 June 2013.. See note on "impediens" regarding reason for change of authority.