The Armenian or Radde's viper (Montivipera raddei) is endemic to the Armenian Highlands. It inhabits arid forests, juniper sparse forests, mountain grasslands, stony slopes with sparse trees and scrubs at 1300-1800 m, sometimes up to 2500-2700 m above sea level. It is active from early April to late October. Mating begins in mid-May and lasts until late June. The gestation period is 150-160 days. It is ovoviviparous. Hatchlings emerge from late August to late September.