Sharaf al-Zamān Ṭāhir al-Marwazī or Marvazī (ar|شرف الزمان طاهر المروزي; fl. 1056/57–1124/25 CE) was a physician and author of Nature of Animals (Arabic: كتاب طبائع الحيوان البحري والبري ).
He was a native of Merv,[1] part of the Khorasan region in modern-day Turkmenistan.
Al-Marwazī drew upon the works of Aristotle, Dioscorides, Galen, Oribasius, Timotheos of Gaza, Paul of Aegina, and the Muslim scholar Al-Jahiz. The work comprises five parts:
Al-Marwazi served as physician at the courts of the Seljuk Sultan Malik-Shah I and his successors.[2] As a physician, he recorded observations of parasitic worms.[3]