Geographical distribution of Northern bobwhite.
BirdLife International. 2016. Colinus virginianus. The IUCN Red List of Threatened Species 2016: e.T22728956A95000808. https://dx.doi.org/10.2305/IUCN.UK.2016-3.RLTS.T22728956A95000808.en. Downloaded on 27 June 2018.
Cephas