Editing Caspian tern (section)

==Distribution and habitat==
Their breeding habitat is large lakes and ocean coasts in [[North America]] (including the [[Great Lakes]]), and locally in [[Europe]] (mainly around the [[Baltic Sea]] and [[Black Sea]]), [[Palearctic|Asia]], [[Africa]], and [[Australasia]] ([[Australia]] and [[New Zealand]]). North American birds [[Bird migration|migrate]] to southern coasts, the [[West Indies]] and northernmost [[South America]]. European and Asian birds spend the non-breeding season in the [[Old World]] tropics.<ref name="R"/> African and Australasian birds are resident or disperse over short distances.<ref name=lynx/>

In 2016, a nest of the Caspian tern was found in the [[Cape Krusenstern National Monument]] in northwestern [[Alaska]], 1,000 miles further north than any previous sighting.  This development was part of a general trend in Alaska of species moving to the north, a tendency ascribed to [[global warming]].<ref>{{cite news| last = Milman | first = Oliver | title = Terns follow record warm temperatures in 'shock' migration to north of Alaska| newspaper = [[The Guardian]]| date = 23 September 2016| url = https://www.theguardian.com/environment/2016/sep/23/terns-migration-alaska  | access-date = 2016-09-27}}</ref>

The global population is about 50,000 pairs; numbers in most regions are stable, but the Baltic Sea population (1400–1475 pairs in the early 1990s) is declining and of conservation concern.<ref name=lynx/><ref name=bwpc/>

The Caspian tern is one of the species to which the ''Agreement on the Conservation of African-Eurasian Migratory Waterbirds'' ([[AEWA]]) applies.