|Location||Iran, Islamic Republic of, North Khorasan|
|Central coordinates||57o 20.00' East 36o 45.00' North|
|IBA criteria||A1, B2|
|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.
|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|
|Land-use||Extent (% of site)|
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 (2015) Important Bird Areas factsheet: Rud-i Jowin and Rud-i Kalshur. Downloaded from http://www.birdlife.org on 07/10/2015
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