Its native range stretches from west Europe to western Siberia.

Modern excavations have suggested that their origins were in western Siberia.

It is found from western Siberia to the Amur region.

The level of oil production in western Siberia is also increasing.

Further, the name was widespread throughout western Siberia.

"I lived in western Siberia for 10 years," she said.

Its fields in western Siberia are believed to hold 560 billion cubic meters of reserves.

These group suicides in northern Europe and western Siberia continued through the 1670s.

In western Siberia there are only around ten of these cranes in the wild.

The remainder would be deported to western Siberia and other regions.