Abstract
Urbanization as a result of human population increase has led to the depletion of natural resources and the destruction of natural wetlands. In contrast, the establishment of treatment and purification of plants has led to the creation of new wetlands (constructed wetlands). Although these new ecosystems established for the treatment of municipal wastewater, and subject to operational and maintenance disturbances, many studies have demonstrated that numbers of bird species using such sites are reasonably higher than expected. The present study has investigated the role of Al-Hadba treatment plant in the conservation of biodiversity and the diversity of birds in particular. This paper emphasizes that, this area is one of the stopover sites for migrating birds, especially aquatic birds, ducks and long-legged waders. A total of 74 species were recorded during the period of study. Moreover, this study observed the breeding of four species; Marbled Teal Marmaronetta angustirostris, Cattle egret Bubulcus ibis, Moorhen Gallinula chloropus, Black-winged stilt Himantopus himantopus. Some factors such as drought, predation and disturbance were affecting the abundance of individuals at the study area.