- Related Topics:
- antelope
- Kobus
- Uganda kob
- white-eared kob
- western kob
kob
-
What is a kob?
The kob (Kobus kob) is a stocky African antelope inhabiting the floodplains of the northern savanna, from Senegal to Ethiopia and south into Uganda and the Democratic Republic of the Congo. There are three subspecies: the western kob (Kobus kob kob), the Uganda kob (K. kob thomasi), and the white-eared kob (K. kob leucotis).
Kobs have strong legs, which allow them to gallop powerfully, though they lack the fleetness of slimmer antelopes. Male kobs are larger than females, weighing about a third more, with thicker necks and muscles. Males have lyre-shaped horns, lack horns, and have darker coats with white markings. Kobs live in open habitats and short, green pastures near water. They gather on high ground during the rains and move to greenbelts during the dry season. They form breeding arenas, called leks, with high population densities.
1 Britannica SourceCreated from Britannica articles using AI. AI can make mistakes, so verify using Britannica articles. -
Where do kobs live in the wild?
Kobs are African antelopes that live in large numbers on the floodplains of the northern savanna, ranging from Senegal to the Ethiopian border and southward into western Uganda and the eastern Democratic Republic of the Congo. They avoid wetlands but stay near floodplain grasslands, preferring open habitats with short, green pastures. Large numbers of kobs permanently reside on extensive plains, such as in Uganda’s Queen Elizabeth National Park. The white-eared kob migrates over a large portion of the Nile floodplain in eastern South Sudan. Kobs live in herds, which makes it harder for stalking predators to approach, and they seek refuge in water when pursued.
Created from Britannica articles using AI. AI can make mistakes, so verify using Britannica articles. -
What does a kob look like?
The kob is a stocky African antelope that looks like a heavier impala. They live in large numbers on the floodplains of the northern savanna. The kob has a strong build with strong legs and overdeveloped hindquarters. This physique allows them to execute a powerful bounding gallop, but they lack the fleetness and endurance of slimmer plains antelopes.
Sexual dimorphism is present in kobs. Females are slender compared with males, who possess thick necks and bulging muscles. Male Uganda kobs are a rich reddish-brown color with bold black stripes fronting their legs. Males also have darker coats that enhance the white throat patch, underparts, eye rings, and insides of their ears. They are armed with heavily ridged lyre-shaped horns that are 40–69 cm (16–27 inches) long, while the females are hornless.
Created from Britannica articles using AI. AI can make mistakes, so verify using Britannica articles. -
What do kobs eat?
Kobs are herbivores that depend on floodplain grasslands near water, preferring open habitats with short, green pastures. They move downslope into the greenbelts of tall perennial grasses as the dry season progresses.
As ruminants, kobs are closely tied to their environment and eat a variety of plant species, though at any one season a large part of their diet consists of only five or six plants. They are dependent on feeding areas not covered by too much snow or shriveled under a drought, and on the regulating effects of fire or other herbivores on the seasonal succession of vegetation.
2 Britannica SourcesCreated from Britannica articles using AI. AI can make mistakes, so verify using Britannica articles. -
How do kobs behave in groups?
The kob is a social antelope that lives in herds on open plains. Traditional breeding arenas, known as leks, are located on floodplains where kobs gather, reaching densities of 40–60 animals per square kilometer. Mixed herds, including hundreds of females and young, and bachelor males circulate around the arenas, and most females come to an arena to breed.
Living in herds on open plains makes it difficult for stalking predators to approach them. When pursued by hyenas or wild dogs, kobs seek refuge in the nearest body of water.
3 Britannica SourcesCreated from Britannica articles using AI. AI can make mistakes, so verify using Britannica articles. -
Why are kobs important to their ecosystems?
Kobs are vital to their floodplain grassland ecosystems because they graze on short, green pasture, influencing vegetation structure and composition. They reside permanently on extensive plains, such as in Uganda’s Queen Elizabeth National Park, and congregate in large numbers, reaching high densities.
Additionally, kobs form traditional breeding arenas, or leks, which are high-population-density areas. These arenas are essential for genetic exchange and maintaining the overall health and diversity of the kob population. The movements and grazing habits of the white-eared kob, which formerly numbered in the hundreds of thousands, significantly impact the Nile floodplain in eastern South Sudan.
1 Britannica SourceCreated from Britannica articles using AI. AI can make mistakes, so verify using Britannica articles.
kob, (Kobus kob), small, stocky African antelope (tribe Reduncini, family Bovidae) that occurs in large numbers on floodplains of the northern savanna. The kob ranges from Senegal in the west to the Ethiopian border in the east and southward into western Uganda and eastern Democratic Republic of the Congo. There are three distinct subspecies: the western kob (Kobus kob kob), the Uganda kob (K. kob thomasi), and the white-eared kob (K. kob leucotis) of eastern South Sudan.
The kob resembles a heavier impala. Its stocky build with strong legs and overdeveloped hindquarters make for a powerful bounding gallop but not for the fleetness and endurance of slimmer plains antelopes. Females are slender compared with males, which have thick necks and bulging muscles. At 94 kg (207 pounds), bucks weigh one-third more than does and stand 8 cm (3 inches) taller (90–100 cm [35–39 inches]). Armed with heavily ridged lyre-shaped horns 40–69 cm (16–27 inches) long, males stand out in a crowd of hornless females; they also have darker coats that enhance the white throat patch, underparts, eye rings, and insides of ears. Sexual dimorphism reaches its extreme in the white-eared kob, with males the colour of ebony. Male Uganda kob are a rich reddish brown with bold black stripes fronting their legs.
The kob avoids wetlands while remaining dependent on floodplain grassland near water. It prefers open habitat with short, green pasture. Large numbers of kob permanently reside on extensive plains—e.g., in Uganda’s Queen Elizabeth National Park. They congregate on the highest, driest ground with the shortest, greenest grass during the rains and move downslope into the greenbelts of tall perennial grasses as the dry season progresses. The white-eared kob, formerly numbering in the hundreds of thousands, migrates over a large portion of the Nile floodplain in eastern South Sudan.
" height="20" alt="HEW Logo">
Traditional breeding arenas, or leks, are found on floodplains where kob aggregate, reaching densities of 40–60 animals per square kilometre (100–160 animals per square mile). The kob is one of only three antelopes (along with the lechwe and topi) known to form high-population-density breeding arenas. Surrounded by conventional territories of about 50 hectares (124 acres), “permanently” occupied by males competing for herds of 5–40 females and young, an arena is a lawn of short grass or trampled bare ground where 30–40 territorial males crowd together in a space the size of a single conventional territory. Mixed herds including hundreds of females and young and bachelor males circulate around the arenas, and most females come to an arena to breed on their day of estrus. Males are attracted by the females to the arenas, but females are probably guided by the accumulation of estrogen-rich urine deposited by earlier visitors to run the gauntlet of eagerly displaying rams and to home in on just a few centrally located courts. Breeding is year-round in most kob populations, but white-eared kob breed during migration on temporary arenas.
Gestation is about eight months, and calves hide for up to six weeks. Living in herds on open plains, kob are hard for stalking predators (big cats) to approach. When pursued by hyenas or wild dogs, they seek refuge in the nearest body of water. See also Kobus.