Study sheet with drawing examples: portraits, animals, insects

Nineteenth print from a series of drawing models of unknown extent. Study sheet with heads, animals, and insects. Center: three portraits, from left to right: Frederick III the Wise (Elector of Saxony), Anthony van Dyck, and Quinten Massys (the last with his name, place of death, and year). Surrounding them: various animals and insects including a toucan (after an illustration by Gessner), fox, hare (after Aegidius Sadeler), elephant beetle, and butterfly (after Hoefnagel).