This is a common migrant to the dry coastal areas of the country. The Caspian Tern enjoys a very large range and can be found from North America, through Europe, Africa an Asia to Australia and New Zealand.
The conservation status of this species is regarded as Least Concerned (IUCN Red List).
This is a species protected under the Fauna and Flora Protection Ordinance as amended by Act No. 22 of 2009.
I have observed this species in dry coastal areas around the country during the migrant season. In the north they are common during the season in the Jaffna peninsula, the islands off the coast of Jaffna and in Mannar. On the northwestern coast I have observed them at many locations northwards from Chilaw sand spits. They are a common site in Bundala, kalametiya and at Yala National Park. Few pairs are known to breed in tiny off shore islands.
In Wilpattu they can be seen during the season on the coastal boundaries and at Kudiramale Point. In June 2018 I observed on bird, possibly a summer loiterer, at Kokkare Villu.