Up to 5,000 ducks use the Park s wetlands in winter and on migration. Numerous raptors use the Park, particularly in winter. Hawks are resident. Peregrine Falcons are rare but regular in winter and on migration. In 2000-2001, a Bald Eagle overwintered.
Shorebirds can be numerous in spring if water levels are suitable.
Currently, the wetlands are only reliably flooded in fall and winter. In some years, the Park is completely dry in spring and summer. The wetland areas are on the west side of the Park, near the river. The largest urban park in North America is located where the desert meets the mountain. Birds of both ecosystems can be seen at the picnic area.