Lake Hyōko

Lake Hyōko in winter

Lake Hyōko (瓢湖) is a 281-ha reservoir area in the city of Agano, Niigata, Japan.

On October 30, 2008, it was registered as a Ramsar site.

Birds

• Whooper swan オオハクチョウ (大白鳥) (October–March)
• Tundra swan コハクチョウ (小白鳥)　(October–March)
• Northern pintail オナガガモ (尾長鴨) (October–March)
• Common pochard ホシハジロ (星羽白) 　(October–March)
• Indian spot-billed duck カルガモ (軽鴨) (all seasons)

Plants

Land

• Nelumbo nucifera ハス (蓮) white (July–August)
• Iris アヤメ (菖蒲) blue-purple (May)

Aquatic

• Trapa natans var. japonica オニビシ (鬼菱)
• Phragmites アシ (葦)
• Manchurian wild rice マコモ (真菰)

Coordinates: 37°50′18″N 139°14′14″E / 37.83833°N 139.23722°E