European Stonechat - Taxonomy

Taxonomy

Two weakly defined subspecies are currently accepted:

• Saxicola rubicola rubicola. In the south and east of its range, from Denmark southwest to Spain and northern Morocco, east to Poland and Ukraine, and southeast to Turkey.
• Saxicola rubicola hibernans. Northwestern Europe in Atlantic coastal areas, in southwestern Norway, Great Britain, Ireland and northwestern France. Birds in coastal Portugal are also often listed as this subspecies but this is disputed.

The two subspecies differ in colour intensity following Gloger's rule, with S. r. rubicola paler and with larger white patches in the drier European continental and mediterranean climates, and S. r. hibernans darker brown with less white in the humid Atlantic oceanic climate. They intergrade broadly where their ranges meet, from southeastern England south through France and Spain, and many individuals are not identifiable to subspecies. Extreme examples of S. r. rubicola from the driest southern areas of its range such as the Algarve and Sicily are particularly pale and with a large white rump, and can be very similar to Siberian Stonechats in appearance. nDNA microsatellite fingerprinting reveals a very small degree of separation between the two subspecies.

In the past, the European Stonechat was generally considered conspecific with the Siberian Stonechat and African Stonechat, lumped together as Common Stonechat S. torquatus. A new review adding mtDNA cytochrome b sequence and nuclear DNA microsatellite fingerprinting evidence strongly supports their separation into distinct species. Due to a misunderstanding of the rules of Zoological nomenclature, for a short time the name S. torquatus was erroneously used for the European Stonechat rather than the African Stonechat.

Together with the Siberian Stonechat and Canary Islands Stonechat it constitutes eastern and western representatives of an Eurasian lineage; the Asian and European populations separated during the Late Pliocene or Early Pleistocene, roughly 1.5-2.5 mya, and Fuerteventura was colonised by western European or northwest African birds somewhat later in the Early Pleistocene, about 1-2 mya.

The etymology of the English name derives from its call, sounding like two stones knocked together. The scientific name Saxicola means "rock-dweller", from Latin saxum, a rock + incola, dwelling in; and rubicola, "bramble-dweller", from Latin Rubus, brambles + incola; the subspecies name hibernans refers to Ireland (Latin, Hibernia).