Wytsman's Genera Avium was originally intended to describe all avian groups but his death and the onset of the First World War brought an end to the project. However, twenty-six monographs of various groups of birds were prepared by different authors, including Louis Brasil, Alphonse Dubois, Ernst Hartert, Charles Edward Hellmayer, Carl Parrot, Tommaso Salvadori and Philip Lutley Sclater, with artists include Keulemans and Gronvold. Wytsman himself wrote the part on the Todidae. Twelve of the plates are of parrots: Stringopidæ (1); Nestoridæ (1); Cacatuidæ (2); Loriidæ (6); and Cyclopsittacidæ (2).

First edition, 26 original parts with wrappers bound in; 4to; 44 chromolithographed plates; modern half calf gilt, marbled boards, light fade to spine, a very good clean set.

Zimmer 695-97; Anker 56; McGill/Wood 638; Nissen IVB, 1028; Yale Library 318