The Tyra (also called Tyrka) is a

stream A stream is a continuous body of water, body of surface water Current (stream), flowing within the stream bed, bed and bank (geography), banks of a channel (geography), channel. Depending on its location or certain characteristics, a stream ...

in the Czech Republic, a left tributary of the

Olza Olza may refer to: *Olza (river), a river in the Czech Republic and Poland *Olza, Silesian Voivodeship, a village in Poland *Cendea de Olza/Oltza Zendea, a municipality in Spain *SS Olza, SS ''Olza'', a Polish ship {{disambig ...

River. It flows through

Třinec Třinec (; pl, Trzyniec ; german: Trzynietz) is a city in Frýdek-Místek District in the Moravian-Silesian Region of the Czech Republic. It has about 34,000 inhabitants and is the least populated statutory city in the country. The city is an ...

in the Moravian-Silesian Region. It is long.

Name

The stream was originally officially named Tyrka (diminutive of Tyra), but during the era of Austria-Hungary it was mistakenly labeled as Tyra by an Austrian soldier, and has retained that name ever since. Locals call the stream only Tyrka, but efforts to officially rename it back to Tyrka were abandoned in 2023 due to the costs it would entail.

Characteristic

The Tyra flows exclusively through the municipal territory of

. It originates in the woods in Třinec-Tyra in the

Moravian-Silesian Beskids The Moravian-Silesian Beskids (Czech: , sk, Moravsko-sliezske Beskydy) is a mountain range in the Czech Republic with a small part reaching to Slovakia. It lies on the historical division between Moravia and Silesia, hence the name. It is part o ...

at the elevation of and flows north through Třinec-Oldřichovice to the centre of Třinec, where it enters the Olza River in the area of

Třinec Iron and Steel Works Třinec Iron and Steel Works (TŽ) ( cs, Třinecké železárny, pl, Huta trzyniecka) is a producer of long rolled steel products in Třinec, Moravian-Silesian Region, Czech Republic. TŽ produces over a third of all steel produced in the Cze ...

at the elevation of . The stream is long. Its drainage basin has an area of . The longest tributary of the Tyra is the 5.6 km-long stream of Oldřichovský potok. In the upper course, until its confluence with the brook of Planá dolina, the Tyra flows through a wooded valley and has a mountainous character.

Fauna

The occurrence of the fish common minnow and

alpine bullhead The alpine bullhead or Siberian bullhead (''Cottus poecilopus'') is a species of freshwater fish in the family Cottidae of sculpins. It is found in China, the Czech Republic, Denmark, Finland, Germany, North Korea, Moldova, Norway, Poland, Rom ...

was documented in the stream.

References

{{authority control Rivers of the Moravian-Silesian Region Třinec Cieszyn Silesia