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Location Chad, Batha
Central coordinates 19o 40.00' East  15o 31.00' North
IBA criteria A1, A3
Area 7,795,000 ha
Altitude 180 - 250m
Year of IBA assessment 2001





Site description The Ouadi Rimé–Ouadi Achim Faunal Reserve, one of the largest protected areas in Africa, is situated in the centre of the country and covers three major habitat-types, Sahelian wooded grassland, sub-desert grassland, and desert. The wooded grassland includes areas of fixed dunes separated by wadis and depressions. The vegetation of this habitat is characterized by annual grasses interspersed with trees such as Acacia senegal, Balanites aegyptiaca, Combretum glutinosum and Boscia senegalensis. Sub-desert grassland covers some two-thirds of the reserve. Characteristic grasses include Aristida mutabilis, Chloris prieurii and Cenchrus biflorus, while the herbs Limeum viscosum, Indigofera hochstetteri and Blepharis linariifolia are also common. Trees, particularly Acacia tortilis, are concentrated in dune depressions. In the desert there is little permanent vegetation, but the hardy plant Cornulaca monacantha occurs in clumps on sandy soils. Topographically, the reserve is relatively featureless and, apart from one small area of volcanic outcroppings, there is little rocky country. The Goz Kerky is a long, largely continuous dune cordon which runs north–south through the reserve.The site is bordered to the east by a series of 1,500 m high massifs, from which arise the series of parallel wadis which dissect the reserve. With their associated flood-plains, temporary pools and inundation zones, these wadis greatly enhance the topographical and biological diversity of the reserve. Rainfall is restricted to July–September. There is considerable variation in mean annual rainfall, both between the north and the south of the reserve and between years at any one place. Thus, representative figures for the Sahelian wooded grassland are (e.g. at Abeché) mean annual rainfall 413 mm (range 105–980 mm), for sub-desert grassland (e.g. Arada) 205 mm (range 43–570 mm), and for desert (e.g. at Faya) 14 mm (range 0–73 mm).

Populations of IBA trigger species

Species Season Period Population estimate Quality of estimate IBA Criteria IUCN Category
Yellow-breasted Barbet Trachyphonus margaritatus resident  1997  present  A3  Least Concern 
Sooty Falcon Falco concolor breeding  1997  present  A3  Near Threatened 
Nubian Bustard Neotis nuba resident  1997  present  A1, A3  Near Threatened 
Arabian Bustard Ardeotis arabs resident  1997  present  A3  Near Threatened 
Savile's Bustard Lophotis savilei resident  1997  present  A3  Least Concern 
Crowned Sandgrouse Pterocles coronatus resident  1997  present  A3  Least Concern 
Lichtenstein's Sandgrouse Pterocles lichtensteinii resident  1997  present  A3  Least Concern 
African Collared-dove Streptopelia roseogrisea resident  1997  present  A3  Least Concern 
Pharaoh Eagle-owl Bubo ascalaphus resident  1997  present  A3  Least Concern 
Sahelian Woodpecker Dendropicos elachus resident  1997  present  A3  Least Concern 
Sennar Penduline-tit Anthoscopus punctifrons resident  1997  present  A3  Least Concern 
Rusty Lark Mirafra rufa resident  1997  present  A3  Least Concern 
Greater Hoopoe-lark Alaemon alaudipes resident  1997  present  A3  Least Concern 
Bar-tailed Lark Ammomanes cinctura resident  1997  present  A3  Least Concern 
Desert Lark Ammomanes deserti resident  1997  present  A3  Least Concern 
Cricket Longtail Spiloptila clamans resident  1997  present  A3  Least Concern 
Fulvous Chatterer Turdoides fulva resident  1997  present  A3  Least Concern 
Chestnut-bellied Starling Lamprotornis pulcher resident  1997  present  A3  Least Concern 
Black Scrub-robin Cercotrichas podobe resident  1997  present  A3  Least Concern 
White-tailed Wheatear Oenanthe leucopyga resident  1997  present  A3  Least Concern 
Blackstart Cercomela melanura resident  1997  present  A3  Least Concern 
Passer simplex resident  1997  present  A3  Not Recognised 
Sudan Golden Sparrow Passer luteus resident  1997  present  A3  Least Concern 

Protected areas

Protected area Designation Area (ha) Relationship with IBA Overlap with IBA (ha)  
Ouadi Rimé-Ouadi Achim Faunal Reserve 8,000,000 protected area contains site 7,795,000  

Habitats

IUCN habitat Habitat detail Extent (% of site)
Grassland   23%
Desert   76%

Land use

Land-use Extent (% of site)
agriculture -
nature conservation and research -
other -
Notes: Firewood collection.

Other biodiversity Threatened mammals include Gazella dama (EN, few), Gazella dorcas (VU) and Gazella rufifrons (VU). In addition, Acinonyx jubatus (VU) and Addax nasomaculatus (VU) used to occur but probably no longer do so, while Oryx dammah (EW) has certainly been extirpated.

References Newby (1979, 1980), Scholte (2001).

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Recommended citation  BirdLife International (2014) Important Bird Areas factsheet: Ouadi Rimé - Ouadi Achim. Downloaded from http://www.birdlife.org on 30/09/2014

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