An important influence on his animal studies was the scientific naturalism of the Flemish artist Joris Hoefnagel known primarily for his illuminated manuscripts and still lifes on vellum. Hoefnagel's studies of flowers and insects were engraved and published under the title "Archetypa studiaque patris Georgii Hoefnagelii" by his son Jacob Hoefnagel in 1592 in Frankfurt. The book is a collection of 48 engravings of plants, insects and small animals shown "ad vivum" made after studies by Joris Hoefnagel and was very influential on next generations of animal painters.