Upon Vushmgir's death in 967, his eldest son Bisutun marched to the capital Gurgan to take control of the Ziyarid state. A Samanid army that had arrived shortly before Vushmgir's death for a joint cam

Zahir al-Dawla Vushmgir was the second Ziyarid emir who ruled from 935 until his death in December 967. He was a son of Ziyar. Voshmgir means "quail catcher" in the local Caspian Iranian dialects.