Seskar (Russian: Сескар; Swedish: Seitskär; Finnish: Seiskari), or Siskar, is an island in the Gulf of Finland, part of the Leningrad Oblast of Russia.
The island has been designated an Important Bird Area (IBA) by BirdLife International because it supports populations of many species of waterfowl and waders on passage, as well as breeding Arctic herring gulls.
[1] The island was an independent municipality of Finland populated by Finns since at least the 16th century.
It was part of the province of Viipuri in the South Karelia region.
The island has been involved in many shipwrecks over the centuries, including some ships sunk, wrecked or otherwise lost: