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2. White-tipped Dove (Leptotila verreauxi)
3. Ridgway, R. (1916). The birds of North and Middle America. Part VII. Bulletin of the United States National Museum 50, part 7.
4. Pyle, P. (2022). Identification Guide to North American Birds. Part I, Second Edition. Slate Creek Press, Forest Knolls, California, USA.
5. Baptista, L. F., P. W. Trail and H. M. Horblit (1997). Grey-headed Dove Leptotila plumbeiceps. In Handbook of the birds of the World, Volume 4: Sandgrouse to cuckoos (del Hoyo, J., A. Elliott and J. Sargatal), Lynx Edicions, Barcelona, Spain. pp. 169-170.