|Central coordinates||6o 0.00' West 35o 34.00' North|
|IBA criteria||A1, A4i|
|Altitude||0 - 50m|
|Year of IBA assessment||2001|
Site description The site consists of the lower reaches of the Oued M’harhar and Oued Al Hachef, which join to form the 3-km-long estuarine river of the Oued Tahadart, the surrounding land and a sandy stretch of the coast between Tanger (Tangiers) and Asilah. Habitats include marshy basins, coastal mudflats, many small freshwater and brackish merjas and dayas, areas of rough pasture and some patches of cork-oak woodland.
Key Biodiversity See Box for key species. The site harbours one of the few populations of Otis tarda in Morocco—the only country in North Africa where this species occurs. Precise data on population size are not available, but 35 individuals were seen at Tahadart and 55 in Al Hachef–Charkane during surveys in 1998, and evidence of breeding was observed (courtship displays, nests). Thousands of migrant waders, gulls and waterfowl pass through Oued Tahaddart, particularly in winters with heavy rainfall when much of the site is inundated. Up to 600 Grus grus and hundreds of Phoenicopterus ruber and Platalea leucorodia have been recorded, but none of these species is known to have exceeded IBA threshold criteria. Numenius tenuirostris formerly occurred as a wintering visitor.
Non-bird biodiversity: None known to BirdLife International.
|Species||Season||Period||Population estimate||Quality of estimate||IBA Criteria||IUCN Category|
|Great Bustard Otis tarda||resident||-||present||-||A1||Vulnerable|
|Charadrius alexandrinus||winter||-||1,020 individuals||-||A4i||Not Recognised|
|2014||very high||not assessed||low|
|Medium - based upon reliable but incomplete / partially representative data|
|Agriculture and aquaculture||livestock farming and ranching (includes forest grazing) - scale unknown/unrecorded||happening now||majority/most of area/population (50-90%)||moderate to rapid deterioration||high|
|Human intrusions and disturbance||work and other activities||happening now||majority/most of area/population (50-90%)||very rapid to severe deterioration||very high|
|Natural system modifications||dams & water management/use - abstraction of surface water (agricultural use)||happening now||some of area/population (10-49%)||very rapid to severe deterioration||high|
|Residential and commercial development||commercial and industrial development||happening now||some of area/population (10-49%)||very rapid to severe deterioration||high|
|Residential and commercial development||housing and urban areas||happening now||some of area/population (10-49%)||very rapid to severe deterioration||high|
|Residential and commercial development||tourism and recreation areas||happening now||some of area/population (10-49%)||very rapid to severe deterioration||high|
|Transportation and service corridors||roads and railroads||happening now||some of area/population (10-49%)||very rapid to severe deterioration||high|
|Whole area of site (>90%) covered by appropriate conservation designation||No management planning has taken place||Very little or no conservation action taking place||low|
|Land-use||Extent (% of site)|
References BCEOM-SECA (1995c), Hellmich et al. (1999).
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Recommended citation BirdLife International (2015) Important Bird and Biodiversity Area factsheet: Oued Tahadart. Downloaded from http://www.birdlife.org on 01/12/2015
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