REFERENCES
- Brelsford , W. V. 1942 . — Ibis January. 1941. Ibis, January. 1942. Ostrich, March
- Van Someren . — “Birds of Kenya and Uganda in J. of E.Af. and Uganda Nat. Hist. Soc. No. 47–48. A variable characteristic
- Button , E. L. 1942 . — “Grey Kestrel”. Ostrich. September
- Winterbottom , J. M. 1938 . — “Further Notes on some N. Rhodesian Birds”. Ibis April
- Benson , C. W. 1937 . — “Miscellaneous Notes on Nyasaland Birds”. Ibis July