Siberian crane
Taking into consideration the unfavorable conservation status of the Siberian crane ("Leucogeranus leucogeranus") and the fact that the species has the longest migration route of all crane species ranging from breeding areas in the Arctic regions of Asia to wintering grounds in southern Asia, the range states acknowledged that the species would benefit from international cooperation between the countries. Therefore, as the first one to be conducted under the CMS, an Article IV agreement was concluded and entered into effect on 1 July 1993 and was later revised in January 1999.