GERENUK, a long-necked aberrant gazelle, commonly known as Waller's gazelle (Lithocranius walleri), and ranging from Somaliland to Kilimanjaro. The gerenuk is a large species with long neck and limbs. The horns of the bucks are heavy, and have a peculiar forward curvature at the tips ; the coat is red-fawn, with a broad brown band down the back. Gerenuk, in Somaliland, are found in family parties, and feed by browsing on the branches and leaves of trees and shrubs. (See ANTELOPE.)