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The Arctic tern is famous for its migration; it flies from its Arctic breeding grounds to the Antarctic and back again each year. The shortest distance between these areas is 19,000 km (12,000 mi). The long journey ensures that this bird sees two summers per year and more daylight than any other creature on the planet. [11]
The common tern is one of the species to which the Agreement on the Conservation of African-Eurasian Migratory Waterbirds (AEWA) and the US–Canada Migratory Bird Treaty Act of 1918 apply. [ 120 ] [ 121 ] Parties to the AEWA agreement are required to engage in a wide range of conservation strategies described in a detailed action plan.
Migration is the regular seasonal movement, often north and south, undertaken by many species of birds. Migration is marked by its annual seasonality and movement between breeding and non-breeding areas. [16] Nonmigratory bird movements include those made in response to environmental changes including in food availability, habitat, or weather.
Migratory terns move to the coast after breeding, and most species winter near land, although some marine species, like the Aleutian tern, may wander far from land. The sooty tern is entirely oceanic when not breeding, and healthy young birds are not seen on land for up to five years after fledging until they return to breed.
The Caspian tern (Hydroprogne caspia) [2] is a species of tern, ... North American birds migrate to southern coasts, the West Indies and northernmost South America.
The PGC reports there was never a wide-spread population of terns at Presque Isle. There are records from the 1930s that show about 100 breeding pairs would stay at Gull Point in Erie County.
The Aleutian tern (Onychoprion aleuticus) is a migratory bird living in the subarctic region of the globe most of the year. It is frequently associated with the Arctic tern , which it closely resembles.
The greater crested tern is a large tern with a long (5.4–6.5 cm or 2.1–2.6 in) yellow bill, black legs, and a glossy black crest that is noticeably shaggy at its rear. The breeding adult of the nominate subspecies T. b. bergii is 46–49 cm (18–19.5 in) long, with a 125–130 cm (49–51 in) wing-span; this subspecies weighs 325–397 g ...