Gulls from Warsaw roost in the middle of the lake, but usually are difficult to see. In Niepor t, south of the sailing club, patch of field and meadow between the motorway and lake is roost of gulls and passage passerines. The small island just near Zegrze is favourite roosting flace of Cormorant flock. Just west of the bridge, there is stone construction and wooden poles in the water, which attract loafing gulls. More flocks of ducks and gulls are seen further west, along the woods and meadows towards the dam at D be.
Birds can sometimes be variable due to the two reasons.
First are the sailing boats, which scare the birds at weekends, even in really cold weather. Completely calm days and mornings are birders' favourite. Second is the freeze-up in autumn. As the reservoir become covered with ice, roosting gulls move conveniently from the middle of the water towards the bridge in Zegrze. Last patches of water remain in Bug mouth and west of Zegrze, and later birds disappear.