Lesser kudu kudu and nyala form a clade, and collectively separated from the sister clade 13.8 million years ago. The lesser kudu has 38 diploid chromosomes. However, unlike others in the subfamily Tragelaphinae, the X chromosome and Y chromosome are compound and each is fused with one of two identical autosomes. The lesser kudu is a spiral-horned antelope. The head-and-body length is typically between . Males reach about at the shoulder, while females reach . Males typically weigh and females . The bushy tail is long, white underneath and with a black tip at the end. Distinct signs of sexual dimorphism are
Lesser kudu territorial behavior, fights are uncommon. While fighting, the lesser kudus interlock horns and try pushing one another. Mutual grooming is hardly observed. Unlike most tragelaphines, females can be closely associated for several years. One to three females, along with their offspring, may form a group. Juvenile males leave their mothers when aged a year-and-a-half, and may form pairs. However, at the age of 4-5 years, males prefer a solitary lifestyle and avoid one another, though four or five bulls may share the same home range. Lesser kudu do not usually associate with other animals, except when they feed in the