Grey partridge, Perdix perdix, male 1 and female 2, red-legged partridge, Alectoris rufa 3, rock partridge, Alectoris graeca 4, Chinese Francolin, Francolinus pintadeanus 5, and red-necked spurfowl, Pternistis afer 6. Handcoloured copperplate engraving from Bertuch's "Bilderbuch fur Kinder" (Picture Book for Children), Weimar, 1798. Friedrich Johann Bertuch (1747-1822) was a German publisher and man of arts most famous for his 12-volume encyclopedia for children illustrated with 1,200 engraved plates on natural history, science, costume, mythology, etc., published from 1790-1830.