The single ancient surviving savin tree represents the glorious history of Khosh-Yeilag whose high areas are the habitat of rams, ewes and wild goats, . The region is considered the richest habitat of these animals in Iran.
Urial ram and ewe are the tallest and the most beautiful ram and ewe in Iran living in Alborz non-rock mountainous areas and on hills. Their snail-shahped horns, on average, grow up to 1 m, which can reveal how old the animals is. They usually of Urial ram and ewe in Iran can be witnessed in the regions around Shahvar, Mojen and also in Khosh-Yeilag wildlife preserve.