Lake Urmia (Orumieh or Orumiyeh) in northwest Iran  was once the largest lake in the middle east and the sixth largest saltwater lake on the earth but in recent years is facing a dramatic decline due to inefficient  irrigation methods.These years Flamingos prefer to stay in lake Urmia national park instead of migrating as better ecological conditions in the biosphere reserve.
In the past birds flew to other areas  such as south Africa and Persian gulf but now because of enough supplies they are now living in lake Urmia national parks southern ereas such as Hasanlu and Kaniborazan wetland.By long periods of drought , daming rivers and mismanagement has effected the lake’s status over time .
The Orumieh lake which was thee home to hundreds of thousands of migratory birds and was a major spot of tourist attraction has gradually shrunk . In 1997 the volume of water at the lake measured at 30 billion cubic meters which dramatically decreased to half a billion cubic meters in 2013 and while the lake had a surface area of 5,000 square kilometers in 1997 the surface shrunk to one tenth of that to 500 square kilometers in 2013.

However by planning restoration programs the volume of water rose to 2.5 billion cubic meters in 2017 and the surface area has now restored to almost half of the original amount measuring at 2,300 square kilometers. The return of the migratory birds could be also a sign of restoration of the lake.