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Location Iran, Islamic Republic of, North Khorasan
Central coordinates 57o 20.00' East  36o 45.00' North
IBA criteria A1, B2
Area 250,000 ha
Altitude 1,000 - 1,300m
Year of IBA assessment 1994

Site description A vast area of cultivated upland plains and gently undulating hills, c.90 km from east to west and 30 km north to south, including the broad valleys of the Rud-i Jowin and Rud-i Kalshur rivers. The rivers flood in winter and spring and are reduced to a series of stagnant brackish pools by late summer. There are some seasonally flooded brackish marshes. Other habitats include cultivated land (mainly cereals), salt-tolerant vegetation in depressions on the valley floors, and Artemisia steppe on the rolling hills. There is some livestock grazing.

Key Biodiversity See box for key species. A wintering area for Otis tarda in the 1970s, with birds present from November until late February; up to 13 have been recorded by Department of the Environment personnel, but local farmers have reported flocks of up to 70. The site is also a wintering area for ducks, mainly Anas platyrhynchos and A. crecca.

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
Great Bustard Otis tarda winter  1977  13-70 individuals  good  A1, B2  Vulnerable 


IUCN habitat Habitat detail Extent (% of site)
Artificial - terrestrial   major
Grassland   minor
Wetlands (inland)   minor

Land use

Land-use Extent (% of site)
rangeland/pastureland minor
agriculture major

Acknowledgements Data-sheet compiled by Dr D. A. Scott, reviewed by Dept of Environment.

References Adhami (1972b), Eftekhar (1973b), Kharom (1976).

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Recommended citation  BirdLife International (2016) Important Bird and Biodiversity Area factsheet: Rud-i Jowin and Rud-i Kalshur. Downloaded from on 22/10/2016

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