Die Geelbeklyster (Turdus smithi) is ‘n endemiese, gelokaliseerde algemene standvoël meestal in rivierbos en halfdorre Karoo en ingevoerde boomveld op hoëveld. Dit is ook ‘n algemene tuinvoël. Hulle kom een-een of in pare voor maar vorm groepe buite broeityd. Die voël is 22 – 24 cm groot en weeg 60 – 86 gram. In Engels staan die voël bekend as die Karoo Thrush.
The Karoo thrush (Turdus smithi) also known as Smith′s thrush, is a member of the thrush family in Africa. It has traditionally been considered a subspecies of the olive thrush (with which it is known to hybridize), but is increasingly treated as a separate species. This medium-sized bird has a length of about 24 cm. It has a wing length between 117 and 131 mm, a culmen length between 20 and 24 mm and a tarsus length between 30.0 and 34.5 mm. It can reach a mass of at least 86 g. It differs from the olive thrush by its longer, entirely yellow bill, its longer wings, and its greyer flanks.