Byasa impediens

{{Short description|Species of butterfly}}

{{Speciesbox

| name = Pink-spotted windmill

| image = Byasa impediens febanus.jpg

| taxon = Byasa impediens

| authority = (Seitz, 1907){{cite web |url=http://www.insects-online.de/frames/papilio.htm |title=Papilionidae – revised GloBIS/GART species checklist (2nd draft) |author1=Häuser, Christoph L. |author2=de Jong, Rienk |author3=Lamas, Gerardo |author4=Robbins, Robert K. |author5=Smith, Campbell |author6=Vane-Wright, Richard I. |date=28 July 2005 |work=Entomological Data Information System |publisher=Staatliches Museum für Naturkunde Stuttgart, Germany |accessdate=21 June 2013 |archive-date=9 September 2010 |archive-url=https://web.archive.org/web/20100909141739/http://www.insects-online.de/frames/papilio.htm |url-status=dead }}. See note on "impediens" regarding reason for change of authority.

| synonyms =

• Atrophaneura impediens (Rothschild, 1895)[http://www.nic.funet.fi/pub/sci/bio/life/insecta/lepidoptera/ditrysia/papilionoidea/papilionidae/papilioninae/atrophaneura/index.html Funet, Atrophaneura]

}}

Byasa impediens, the pink-spotted windmill, is a species of butterfly from the family Papilionidae (swallowtails) found in Taiwan.{{Cite web |url=http://en.butterflycorner.net/Atrophaneura-impediens.1117.0.html |title=ButterflyCorner.net |access-date=2011-07-15 |archive-date=2012-09-17 |archive-url=https://web.archive.org/web/20120917121736/http://en.butterflycorner.net/Atrophaneura-impediens.1117.0.html |url-status=dead }}

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.

The larva feeds on Aristolochia species.