On September 6, 2007, the two postal administrations of Moldova and Ukraine have put into circulation an interesting joint series (2 stamps) dedicated to the preservation of wildlife living in the Dniester River ("Nistru" in Romanian), and in particular fish species. This river, having its source in the western Ukraine, actually marks the border between these two countries, northeast of Moldova and on a small portion in the southeast, before flowing into the Black Sea. On the rest of Moldovan territory, this river marks the western border of Transnistria (bounded to the east by the Ukrainian border). The two postal administrations have both issued these two stamps, separated by an illustrated label including this river on a map as well as the flags of the two countries, in a same sheet containing 10 stamps. Read more..