White-crested helmetshrike, Prionops plumatus, and dusky woodswallow, Artamus cyanopterus. Handcoloured copperplate stipple engraving from Dumont de Sainte-Croix's "Dictionary of Natural Science: Ornithology," Paris, France, 1816-1830. Illustration by J. G. Pretre, engraved by David, directed by Pierre Jean-Francois Turpin, and published by F.G. Levrault. Jean Gabriel Pretre (1780~1845) was painter of natural history at Empress Josephine's zoo and later became artist to the Museum of Natural History. Turpin (1775-1840) is considered one of the greatest French botanical illustrators of the 19th century.