Pyvesa is a river of Biržai district municipality,

Panevėžys County Panevėžys County ( lt, Panevėžio apskritis) is one of ten counties of Lithuania, counties in Lithuania. It is in the north-east of the country, and its Capital (political), capital is Panevėžys. On 1 July 2010, the county administration ...

, northern

Lithuania Lithuania (; lt, Lietuva ), officially the Republic of Lithuania ( lt, Lietuvos Respublika, links=no ), is a country in the Baltic region of Europe. It is one of three Baltic states and lies on the eastern shore of the Baltic Sea. Lithuania ...

. It flows for and has a basin area of . It is a right tributary of the

Mūša Mūša ( lv, Mūsa; German: Muhsse) is a river in Northern Lithuania and Southern Latvia (Zemgale region). At its Confluence (geography), confluence with the river Nemunėlis ( lv, Mēmele) in Latvia, near city Bauska, the river Lielupe, Lielupė ...

.LIETUVOS RESPUBLIKOS UPIŲ IR TVENKINIŲ KLASIFIKATORIUS (Republic of Lithuania- River and Pond Classifications)
Ministry of Environment (Lithuania). Accessed 2011-11-17.

References

Rivers of Lithuania Biržai District Municipality {{Lithuania-river-stub