Sharaf al-Zaman al-Marwazi

Sharaf al-Zamān Ṭāhir al-Marwazī or Marvazī (شرف الزمان طاهر المروزي; fl. 1056/57–1124/25 CE) was a physician and author of Nature of Animals (كتاب طبائع الحيوان البحري والبري ).

He was a native of Merv, part of the Khorasan region in modern-day Turkmenistan.

Nature of Animals
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:
 * On human beings
 * On domestic and wild quadrupeds
 * On land and marine birds
 * On venomous creatures
 * On marine animals

Physician
Al-Marwazi served as physician at the courts of the Seljuk Sultan Malik-Shah I and his successors. As a physician, he recorded observations of parasitic worms.