Sharaf al-Zamān Ṭāhir al-Marwazī or Marvazī (Arabic: شرف الزمان طاهر المروزي; fl.
1056/57–1124/25 CE) was a physician and author of Nature of Animals (كتاب طبائع الحيوان البحري والبري Kitāb Ṭabāʾiʿ al-Ḥayawān al-Baḥrī wa-al-Barrī).
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:[2] Al-Marwazi served as physician at the courts of the Seljuk Sultan Malik-Shah I and his successors.