His writings on biology resulted from his research into natural history on and around the island of Lesbos, and have survived in the form of four books, usually known by their Latin names, De anima (On the Soul), Historia animalium (History of Animals), De generatione animalium (Generation of Animals), and De partibus animalium (On the Parts of Animals).
Tulisan-tulisannya tentang biologi dihasilkan dari risetnya dalam sejarah alam di atas dan sekitaran pulau Lesbos, dan dicantumkan dalam bentuk empat buku, biasanya dikenal dengan nama Latinnya, De anima (Tentang Jiwa), Historia animalium (Sejarah Hewan), De generatione animalium (Generasi Para Hewan), dan De partibus animalium (Tentang Bagian-bagian Para Hewan).