 When the water level is at its lowest in the lake, a steppe-like land slope has been noticed with low vegetation of rocky shingle terrain where flocks of larks and lapwings are seen.The bird life in the reservoir area is very notable, as 20,000 migratory birds of species of raptors, storks, pelicans and others species of birds have been sighted.The ferruginous duck ("Aythya nyroca"), pallid harrier ("Circus macrourus"), greater spotted eagle ("Aquila clanga"), eastern imperial eagle ("Aquila heliaca") and sociable lapwing ("Vanellus gregarius") are some of the birds which are of conservation concern, according to the 2008 IUCN Red List.