Geographical distribution of Black-billed cuckoo.    Breeding  Migration  Nonbreeding
BirdLife International. 2016. Coccyzus erythropthalmus. The IUCN Red List of Threatened Species 2016: e.T22684328A93024955. https://dx.doi.org/10.2305/IUCN.UK.2016-3.RLTS.T22684328A93024955.en. Downloaded on 02 June 2018.
Cephas