A festival to celebrate red hair is held regularly in Udmurtia
Russia is home to people from at least 190 ethnic groups and counts more than 20 different republics within its borders.
The Udmurts are said to possess the reddest hair in the world.
The Tatars and Bashkirs descend from the Golden Horde.
The Mari worship animist spirits amid their sacred forest groves.
The connection between these different ethnicities is that they all have their own republics inside the Russian Federation.
I travelled 500 miles (750km) east of Moscow to the Middle Volga lowlands, where six of these republics cluster together to see how they are run.
There have been claims that they are the “most red-headed” people in the world.
The members of the long-extinct Budini tribe, who are said to have been precursors of the modern Udmurts, were described as being predominantly red-headed by the Ancient Greek historian Herodotus .