1. Bent, A.C., 1986. Life Histories of North American Cardinals, Grosbeaks, Buntings, Towhees, Finches, Sparrows and Allies. Pt. 11. Dover, New York.
2. Chishom, A. 1956. Bird Wonders of Australia, 5th edn. Angus & Robertson, Sydney.
3. Eastman. P.D. 1962 The Best Nest. Beginner Books, Division of Random House, New York.
4. Ehrlich, P.R., Dobkin, D.S. & Wheye, D. 1988 The Birder's Handbook. Simon & Schuster, New York and Sydney.
5. Maclean, G.L. 1985 Robert's Birds of Southern Africa. John Voelcker Bird Book Fund, Cape Town.