a river in the Byelorussian SSR, a left tributary of the Pripiat’. It measures 421 km long and drains an area of 9,470 sq km.
The Ptich’ originates on the Minsk Upland and flows through Poles’e. It is fed predominantly by snow. There is high water from the second half of March through May, with an increase in the level of 2–3 m. The low-water period occurs in summer and fall and is interrupted by flash floods. The mean flow rate is 48 cu m per sec. During high water, part of the Ptich’ flows into the Svisloch’ River via the canalized channel of the Titovka River. There is a freeze-up from December through March. The main tributary is the Oressa, on the right. The Volchkovichi Reservoir is located on the Ptich’. Timber is floated on the river, which is navigable during high water for 80 km from the mouth.