Which large herbivore, driven to extinction in the wild by 1927, has been reintroduced to the Caucasus Nature Reserve using animals from captive breeding programmes?

• A The saiga antelope
• B The musk ox
• C The European bison ✓
• D The red deer

The Caucasian wisent (Bison bonasus caucasicus) was extinct by 1927, but hybrids bred from the last captive individuals and lowland bison now roam the Caucasus biosphere reserve.