Literature
- Brom, T. G. 1991b. Variability and phylogenetic significance of detachable nodes in feathers of galliforms, tinamous, and turacos. J. Zool., Lond. 225: 589-604.
- Dunning, J. B. Jr. (ed.). 1993. CRC Handbook of Avian Body Masses. CRC Press, Boca Raton, Florida. 371 pp.
- Shamoun, J. and Y. Yom-Tov [ 1995. ]. The Microstructure of Feathers of Israeli Birds. Publ. Tel Aviv University, 302 pp.