Range map of White-winged tern.    Breeding  Nonbreeding
BirdLife International. 2016. Chlidonias leucopterus. The IUCN Red List of Threatened Species 2016: e.T22694782A86772583. https://dx.doi.org/10.2305/IUCN.UK.2016-3.RLTS.T22694782A86772583.en. Downloaded on 31 December 2018.
Cephas