Geographical distribution of Gray catbird.    Breeding  Migration  Year-round  Nonbreeding
BirdLife International. 2016. Dumetella carolinensis. The IUCN Red List of Threatened Species 2016: e.T22711013A94272855. https://dx.doi.org/10.2305/IUCN.UK.2016-3.RLTS.T22711013A94272855.en. Downloaded on 12 May 2018.
Cephas