1. Type specimens of non-passerines in Naturalis Biodiversity Center (Animalia, Aves)
2. Borrow, N., and R. Demey (2001). Birds of Western Africa. Christopher Helm, London, UK.
3. del Hoyo, J., and N. J. Collar (2014). HBW and BirdLife International Illustrated Checklist of the Birds of the World. Volume 1. Non-passerines. Lynx Edicions, Barcelona, Spain.
4. Barlow, C. R., T. Wacher, and T. Disley (1997). A Field Guide to Birds of The Gambia and Senegal. Pica Press, Robertsbridge, UK.
5. Colston, P. R., and K. Curry-Lindahl (1986). The Birds of Mount Nimba, Liberia. British Museum (Natural History) Publication 982. British Museum (Natural History), London, UK.