Language: Bilingual in Dutch and French
Volume 5, Fascicle 3 (pages 505-576) is fifth and final installment in this series on the passeriform birds of Belgian Congo and Ruanda-Urundi (which later became Rwanda and Burundi). A French summary with identification keys is included. This is part X in the numbering of the birds series. This last volume includes addenda and corrections, and both a systematic list and a general index of all passeriform birds treated in parts 3 and 4 (installments VI to X).