), Fregatidae (frigate birds) and Podicipedidae (grebes) stay on the sea coast, and depending on the weather, may move further south after gathering their strength. But ducks and geese follow the rivers up from their estuaries to their middle reaches, and may take up residence in the cities.
其他眾多水鳥駐留海岸，看天候時，蓄勢待發，雁鴨卻靠著腳蹼，由河口順勢遊入河川中游、進入都會。