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Location Namibia, Caprivi
Central coordinates 23o 45.00' East  18o 18.00' South
IBA criteria A1, A3, A4i
Area 468,000 ha
Altitude 500 - 1,000m
Year of IBA assessment 2001





Site description Located in the eastern Caprivi bulge, this wetland system lies on Namibia’s international border with Botswana, Zambia and Zimbabwe, and stretches from the Kwando river in the west, to the Zimbabwean border-post at Kazungula in the east. It is Namibia’s largest single permanent wetland and is fed by two of the country’s five perennial rivers. The area is divided into five geographically distinct zones: the Upper Kwando (137 km²), Lower Kwando and Linyanti Swamp (3,830 km²), the ephemeral Lake Liambezi (406 km²), the Chobe river and marsh (311 km²) and the Zambezi flood-plains (1,800 km²).

The area is topographically featureless and almost completely flat—a key determinant in the unusual hydrological regime. Under flood conditions, the Kwando is essentially linked to the Zambezi, with water flowing from the Kwando into the Linyanti Swamp, about 10% of which finally reaches Lake Liambezi. This water is, however, insufficient to keep the lake level from dropping. When full, Lake Liambezi has an outlet to the Chobe river, which subsequently joins the Zambezi at Kazungula. When the Zambezi is in flood, the flow is reversed and water is pushed up the Chobe to Liambezi. Lake Liambezi and the flood-plain zone are thus only intermittently inundated, while the Zambezi, Kwando, Linyanti Swamp and Chobe Marsh are permanent features. The abrupt change in the direction of the Kwando river as it merges into the Linyanti system is due to the extensive geological faulting present in the area. Floodwaters channel down the Kwando between June and August and then swing north-east along the Chobe fault into the Linyanti Swamp. It may take up to six months for water to percolate through the Phragmites/Cyperus dominated reed-swamp, as less than one third of the area is open water. By 1997 Lake Liambezi was a dry lakebed, completely overgrown and partly farmed; these long-term dry/wet periods appear to be cyclical.

The Chobe Marsh, into which the Linyanti Swamp and Lake Liambezi drain when full, is more usually inundated by water backing up along the Chobe from the Zambezi river. The Zambezi floods typically last 4–6 weeks in March–April, before subsiding back into side channels and the main Chobe/Zambezi channels. However, the lower-lying flood-plains remain inundated for longer periods, and support vast beds of papyrus and reed in a maze of small channels and islands. The climate of the region can be divided into two distinct seasons—a dry season between April and November, and a shorter wet season which stretches from the end of November to late March/early April. This is the wettest place in Namibia with rainfall averaging 740 mm per year, and sometimes exceeding 1,000 mm per year. The monthly average maximum temperature is about 30°C.

The area is surrounded by pristine riparian fringes, which are extremely rare in Namibia, as they have mostly been destroyed by human activity. The vegetation is dominated by trees of Lonchocarpus, Garcinia, Syzygium and Diospyros. The flood-plain consists of reedbeds, swamps, open flooded grasslands and papyrus. Two conspicuous species on the edge of the flood-plain are the wild date-palm Phoenix and baobab Adansonia.

Populations of IBA trigger species

Species Season Period Population estimate Quality of estimate IBA Criteria IUCN Category
Slaty Egret Egretta vinaceigula winter  100-500 individuals  A1, A4i  Vulnerable 
Slaty Egret Egretta vinaceigula resident  30-200 breeding pairs  A1, A4i  Vulnerable 
Dickinson's Kestrel Falco dickinsoni resident  1998  present  A3  Least Concern 
Wattled Crane Bugeranus carunculatus resident  present  A1  Vulnerable 
Black-winged Pratincole Glareola nordmanni winter  500-1,000 individuals  A1, A4i  Near Threatened 
Coppery-tailed Coucal Centropus cupreicaudus resident  1998  present  A3  Least Concern 
Racquet-tailed Roller Coracias spatulatus resident  1998  present  A3  Least Concern 
Bradfield's Hornbill Lophoceros bradfieldi resident  1998  present  A3  Least Concern 
Chirping Cisticola Cisticola pipiens resident  1998  present  A3  Least Concern 
Miombo Wren-warbler Camaroptera undosa resident  1998  present  A3  Least Concern 
Black-lored Babbler Turdoides melanops resident  1998  present  A3  Least Concern 
Angola Babbler Turdoides hartlaubii resident  1998  present  A3  Least Concern 
Meves's Glossy-starling Lamprotornis mevesii resident  1998  present  A3  Least Concern 
Kurrichane Thrush Turdus libonyanus resident  1998  present  A3  Least Concern 
White-headed Black-chat Myrmecocichla arnoti resident  1998  present  A3  Least Concern 
White-breasted Sunbird Nectarinia talatala resident  1998  present  A3  Least Concern 
Brown Firefinch Lagonosticta nitidula resident  1998  present  A3  Least Concern 
Broad-tailed Paradise-whydah Vidua obtusa resident  1998  present  A3  Least Concern 

Protected areas

Protected area Designation Area (ha) Relationship with IBA Overlap with IBA (ha)  
Bwabwata National Park 637,364 protected area overlaps with site 8,000  
Mamili National Park 34,317 protected area contained by site 34,582  
Mudumu National Park 72,625 protected area overlaps with site 3,000  

Habitats

IUCN habitat Habitat detail Extent (% of site)
Shrubland   48%
Grassland   40%
Forest   10%

Land use

Land-use Extent (% of site)
agriculture -
fisheries/aquaculture -
hunting -
nature conservation and research -
tourism/recreation -

Other biodiversity Threatened mammals occurring here include Lycaon pictus (EN) and thousands of Loxodonta africana (EN).

References Mendelsohn and Roberts (1997), Olivier and Olivier (1993), Schlettwein et al. (1991).

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Recommended citation  BirdLife International (2014) Important Bird Areas factsheet: Eastern Caprivi wetlands. Downloaded from http://www.birdlife.org on 21/09/2014

To provide new information to update this factsheet or to correct any errors, please email BirdLife