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Location Mauritania, Tagant
Central coordinates 12o 7.00' West  17o 51.00' North
IBA criteria A4i, A4iii
Area 1,000 ha
Altitude 100 m
Year of IBA assessment 2001

Site description Tâmourt en Na’âj is situated on Wadi el Abiod in the mountainous area of the Tagant plateau. The wadi and associated wetland depressions stretch over a length of 25 km. Huge mobile dunes cover large parts of the area. The tâmourt is formed by the narrowing of an ancient river valley north of M’Beika; the water flowing towards Gabou (site MR011) is retained firstly in the depression of Tâmourt en Na’âj. There is a dam north of Tâmourt en Na’âj, between it and Gabou, and although it retains the water for a time it does not influence the water-level in the tâmourt. The vegetation of the area includes Phoenix dactylifera, Acacia nilotica, A. raddiana, A. ehrenbergiana, Capparis decidua, Leptadenia pyrotechnica, Maerua crassifolia, Hyoscyamus muticus, Tamarix sp., Salvadora persica, Balanites aegyptiaca, Panicum turgidum and Cenchrus biflorus. Average annual rainfall is c.200 mm.

Key Biodiversity The importance of the wetland for waterbirds varies from year to year, depending on the amount of rainfall received. Other species observed in large numbers include Dendrocygna viduata (9,000), D. bicolor (1,200), Plectropterus gambensis (1,200) and Plegadis falcinellus (1,300).

Non-bird biodiversity: None known to BirdLife International.

Populations of IBA trigger species

Species Season Period Population estimate Quality of estimate IBA Criteria IUCN Category
Northern Pintail Anas acuta winter  2000  11,000 individuals  A4i  Least Concern 
Garganey Spatula querquedula winter  2000  24,000 individuals  A4i  Least Concern 
Ruff Calidris pugnax winter  2000  24,000 individuals  A4i  Least Concern 
A4iii Species group - waterbirds winter  2000  50,000-99,999 individuals  unknown  A4iii   


IUCN habitat Habitat detail Extent (% of site)
Rocky areas   36%
Desert   63%

Land use

Land-use Extent (% of site)
agriculture -
forestry -
water management -
other -
Notes: Collection of wild foods and medicinal plants; firewood collection.

References van Wetten et al. (1990).

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Recommended citation  BirdLife International (2016) Important Bird and Biodiversity Area factsheet: Tâmourt en Na'âj. Downloaded from on 28/10/2016

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