Fish abound, as do waterfowl, crocodiles and, in the southern swamps, hippopotami.
The fauna also is well represented, but tigers which once were frequently seen are now very scarce; panther, hyena, jackal, wild boar, deer (Cervus maral) are common; pheasant, woodcock, ducks, teal, geese and various waterfowl abound; the fisheries are very productive and are leased to a Russian firm.
Southward, the Danube encircles a vast fen, tenanted only by waterfowl and herds of half-wild swine, while the plain which extends to the north-east and east only grows fertile at some distance inland.
Waders and waterfowl are far less abundant, and those occurring are nearly all migratory forms which visit the peninsula of India - the only important exception being two kinds of solitary snipe and the red-billed curlew.
Waterfowl are numerous and the forests of the warm valleys are filled with song-birds and birds of beautiful plumage.