A river, about 345 km (215 mi) long, rising in eastern Bosnia and Herzegovina and flowing generally north along the border between Bosnia and Herzegovina and Serbia to the Sava River.
- It is joined by four main tributaries, the Drina, Bosna, Vrbas and Una.
- The Drina is formed on the Montenegrin frontier by the united streams of the Tara and Piva; curving north-eastwards past Visegrad, it marches for 102 m.
- Snipe, woodcock, ducks and rails, in vast flocks, haunt the banks of the Drina and Save; while the crane, pelican, wild-swan and wild-goose are fairly plentiful.
- Small steamers ply on the Drina, Save and Una, but the Bosna, though broad from its very source, is, like the Vrbas, too full of shallows to be utilized; while the Narenta only begins to be navigable when it enters Dalmatia.
- Ban, each designated by the regional name (Danube, Morava, Drina, Shumaja, Timok and the Ban numeral, e.g.