With reference to the Arctic Tern , consider the following statements:
1.It undertakes one of the longest migrations in the animal kingdom, travelling between the Arctic and Antarctic regions.
2.The Arctic tern is distinguished from the very similar common tern (Sterna hirundo) by its shorter, red legs and bill, longer tail, and grayer underparts.
3.It is classified as Endangered on the IUCN Red List.
Which of the statements given above is/are correct?