IBA Criteria met: A1, B2 (2004)
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Area: 135,548 ha
Most recent IBA monitoring assessment
Year of assessment
Threat score (pressure)
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The Tigris River, although under the threat of dam projects to its south and north, is a natural river which is mostly untouched. It includes almost all kinds of riparian habitats. Four important key biodiversity areas exist on the Tigris River. These are the Bismil Plateau, the Tigris Valley, the Küpeli Mountain and the floods of Cizre and Silopi. Although these four areas are continuations which complement each other, they include different species and habitats.
The Tigris River, together with the Euphrates River, establishes one fourth of the surface water resources of Turkey and has a 16 billion meter cube annual flow rate. The water level and flow rate of the river changes according to season and the highest flow rates are seen in March and April.
The KBA includes the part of the Tigris River which is between the Bismil Plateau and the Eruh Mountains. It contains mountain steppes stretching to the south along with a valley.
Because of being in the crossroads of Mediterranean, step, and semi-desert habitats, area hosts many endemic and sensitive species. One of endangered and Turkey's endemic species is Cicer echinospermum. It is the plant that has highest priority of conservation in KBA.
Hasankeyf, which is in the middle of valley, has an importance in terms of historical and archeological heritage as well as breeding predatory birds. Rocky cliffs (escarpments) in the region host the most crowded populations of predatory birdssuch as Bonelli's eagle (Hieraaetus fasciatus), Lesser kestrel (Falco naumanni), Egyptian vulture (Neophron percnopterus), and Griffon vulture (Gyps fulvus).
Steep slopes are significant breeding grounds for one of the rare bird species called Little swift (Apus affinis); dip and barren slopes called Cinereous bunting (Emberiza cineracea); river bank flora and sandy slopes called Pied kingfisher (Ceryle rudis).
Euphrates softshell turtles (Rafetus euphraticus) live only in Euphrates and Tigris starting with southeastern of Turkey. They nest in dunes of Tigris river bank. Wild goat (Capra aegagrus), use rocks and steep canyons, and Striped hyeana (Hyaena hyaena), use caves and hollows in the bottom of the valley, are the primary mammal species of conservation in KBA.
Due to Tigris Valley's (Dicle Vadisi's)geological structure is locally composed of calcareous rocks, there are many caves through the main stream and it's branches and these caves probably have importance for bat species.
BirdLife International (2020) Important Bird Areas factsheet: Dicle Valley. Downloaded from
http://www.birdlife.org on 30/09/2020.