REFERENCES
- Benson , F. M. 1945 . Observations on a nesting colony of Mottle-backed Weavers Sitagra nigriceps nigriceps Layard, including attacks by a Harrier Hawk Gymnogenys typicus typicus Smith. . Ostrich , 16 : 54 – 65 .
- Chapin , J. P. 1917 . The classification of the Weaverbirds. . Bull. Amer. Mus. Nat. Hist. , 37 ( art. 9 ) : 243 – 280 .
- Chapin , J. P. 1954 . “ The Birds of the Belgian Congo, Part 4 ” . In Bull. Amer. Mus. Nat. Hist. 1 – 846 . 75B
- Friedmann , H. 1922 . The weaving of the Red-billed Weaverbird in captivity. . Zoologica , 2 : 355 – 372 .
- Friedmann , H. 1948 . The parasitic cuckoos of Africa 10 Monograph Number 1, Washington Acad. Science. 204 pp. pls
- Friedmann , H. 1950 . The breeding habits of the Weaverbirds. A study in the biology of behaviour patterns . Smithsonian Report , 1949 : 293 – 316 .
- Von Grzimak , B. 1952 . Zum Balzverhalten des Westafrikanischen Textor-Webers . Hyphantornis (Ploceus) cucullatus, Zeitschr. f. Tierpsychologie , 9 : 289 – 294 .