The Sudd wetlands of southern Sudan are home to more than 800,000 white-eared kob, best known for their annual migration.
These graceful antelopes of central Africa’s well-watered savannas
and floodplain grasslands are best known for their annual migration,
which produces one of the natural world’s great spectacles.
The
Sudd wetlands of southern Sudan, nourished by the White Nile, are home
to an astounding number of white-eared kob—more than 800,000 animals.
When joined by tiang antelopes and Mongalla gazelles they form enormous
migrating herds of more than 1.2 million individuals. Thickly packed
columns of these animals in motion can stretch a staggering 50 miles (80
kilometers) long and 30 miles (48 kilometers) across. Such herds rival
the Serengeti’s teeming masses of wildebeests for the title of the
world’s most massive—and awe-inspiring—mammal migration.
Dry
season finds the Sudd’s white-eared kob in the northern part of their
North Dakota-size range, which occupies a critical ecological niche
between Africa’s lush tropical forests and its arid Sahara sands. There
the animals gather in herds to graze low-lying meadows with access to
permanent water.
But wet season means a move en masse to the
south, as far as 930 miles (1500 kilometers), as the kob chase
nutritious shortgrasses and seek lands less susceptible to flooding.
When
not on the move, white-eared kob live in much smaller groups and visit
the same feeding and breeding grounds again and again. Males gather in
numbers of 15 to 20 at permanent breeding sites known as leks. There
each male establishes his own, smaller territory and patrols its borders
to hold his ground against competitors. Larger female herds visit the
leks to choose mates from among the males. Those males able to hold
prime positions in the center of the larger, circular group lek tend to
have the most success.
When Sudan’s violent civil war wound down,
the white-eared kob provided cheering news as a stunning wildlife
success story. The animal's status in the region had been unknown during
a quarter-century of violent conflict that halted conservation work.
Many feared the worst.
But in 2007, National Geographic
Explorer-in-Residence J. Michael Fay conducted an aerial survey and was
shocked to discover that white-eared kob had not only survived but
thrived in numbers that awed even the most experienced African
naturalists.
Fast Facts
- Type:
- Mammal
- Diet:
- Herbivore
- Size:
- 36 in (92 cm) at shoulder
- Weight:
- 230 lbs (105 kg)
- Group name:
- Herd
- Protection status:
- None
- Did you know?
- A male kob whistles to make sure others are aware of the boundaries of his mating territory.
No comments:
Post a Comment