Unicolored thrush), Bartosz Paprocki and Bohuslav Balbín, among others), that the noble House of Zierotin descends from a certain Oleg of Rus (see for details). Oleg of Drelinia Oleg was a Rurikid ruler of the Drevlyans from 969 to his death in 977. He was the second son of Sviatoslav I of Kiev. Date of birth is not known, but is probably before 957. Sviatoslav split up his domains, and gave the Drevlyan lands to Oleg. Oleg and his brother Yaropolk went to war after their father's death. According to Primary chronicle, Oleg killed Lyut, the son of Yaropolk's chief 	Oleg of Drelinia
11131007	Unicolored thrush Unicolored thrush The unicolored thrush (Turdus haplochrous") is a species of bird in the family Turdidae. It is endemic to Bolivia. Its natural habitat is subtropical or tropical moist lowland forests. Unicolored thrush The unicolored thrush ("Turdus haplochrous") is a species of bird in the family Turdidae. It is endemic to Bolivia. Its natural habitat is subtropical or tropical moist lowland forests.