Greater kudus have a life span of 7 to 8 years in the wild, and up to 23 years in captivity. They may be active throughout the 24-hour day. Herds disperse during the rainy season when food is plentiful. During the dry season, there are only a few concentrated areas of food so the herds will congregate.[3] Greater kudu are not territorial; they have home areas instead. Maternal herds have home ranges of approximately 4 square kilometers and these home ranges can overlap with other maternal herds. Home ranges of adult males are about 11 square kilometers and generally encompass the ranges of two or three female groups.[3] Females usually form small groups of 6-10 with their offspring, but sometimes they can form a herd up to 20 individuals. Male kudus may form small bachelor groups, but they are more commonly found as solitary and widely dispersed individuals. Solitary males will join the group of females and calves (usually 6-10 individuals per group) only during the mating season (April–May in South Africa).[9]
The male kudus are not always physically aggressive with each other, but sparring can sometimes occur between males, especially when both are of similar size and stature. The male kudus exhibit this sparring behavior by interlocking horns and shoving one another. Dominance is established until one male exhibits the lateral display.[10] In rare circumstances, sparring can result in both males being unable to free themselves from the other's horns, which can then result in the death of both animals.
Young calf in Tsavo West
Rarely will a herd reach a size of forty individuals, partly because of the selective nature of their diet which would make foraging for food difficult in large groups.[2] A herd's area can encompass 800 to 1,500 acres (6.1 km2), and spend an average of 54% of the day foraging for food.