Lake Qarun has been a source of fish and a habitat for waterfowl since time immemorial. The lake’s main water source is drainage from agricultural land, which enters through two major drains called el-Batts and el-Wadi. This water has become increasingly saline as agriculture has intensified and the water is now more saline than seawater. Freshwater fish and invertebrates have largely disappeared and marine species have been introduced. This lake is of international importance for wintering waterbirds including Black-necked Grebe, Podiceps nigricollis , and Northern Shoveller, Anas clypeata . A fruitful day can be spent here in el-Fayoum (1h30 driving distance from Cairo) seeing the numerous ancient sites including the small but excellent museum.