The Scottish Blackface Sheep is the commonest sheep in the glens and uplands of Highland Perthshire, so can rightly be regarded as part of the landscape. The species is thought to have originated in the Scottish Borders where it was bred by monks in medieval times, being prized for both its fleece and its meat. Though smaller than some other sheep breeds, the Blackface is noted for its hardiness, enabling it to survive and thrive on poor upland grazings. Together with the Cheviot (another sturdy Borders breed with which it is sometimes crossed), the Scottish Blackface had a major part to play in the so-called Highland Clearances of the 18th and 19th centuries.