Uponeup Wetland offers a place of respite for migratory birds traveling between South and North. Winter is the best time to observe migratory birds as approximately 30,000 of them fly 4,300 km to 6,000 km to Uponeup Wetland in October to escape the cold of the North Polar regions. These include wild geese, swans, mallards, and auks. In summer, such birds as the common kingfisher, bush warbler, and common heron visit the area to lay and hatch eggs. Birds such as titmouse, flycatcher, and magpie live there year-round, and some endangered species like kestrel, stork, and whooper swan are also found there, too.