Fer Servadou is an old dark-skinned red grape variety native to the Basque region of Spain and made its way to the South West region of France. It is known to be a rustic grape variety with strong tannins and redcurrant flavours. The most prominent appellation for production of Fer Servadou is Marcillac, where it must be at least 90 per cent of the blend, normally supported from Cabernet Sauvignon and Merlot. It plays an important role in Gaillac often together with Syrah and not so main role in the neighbouring regions of Madiran, Béarn and Fronton. It is nowhere to be found outside France.