Muljangori-Oreum

Muljangori-oreum wetland is a mountain crater lake formed in a volcanic crater, 900m-937m above sea-level, 9km northeast of Hallasan. The 628000m² lake provides water, which is not abundant on the island, to the indigenous wildlife.

Characteristics

Muljangori-oreum is a parasitic cone formed by volcanic activity at the end of the third Cenozoic Era on Jeju Island. Some 370 parasitic cones are located around Hallasan. Only about 30% of them have mountain craters. Oreum is mostly composed of water-permeable basalt, so it is unusual to have a lake on top of Oreum.

The lake(Muljangori-oreum) is fed by rainfall. During the dry season, most of wetland becomes dries out, except the deepest part in the south (about 50 m of water depth). During the rainy season, most of it is submerged.

Flora and fauna

Birds

• Peregrine falcon (Falco peregrinus)
• Fairy pitta (Pitta brachyura nympha)
• Black kite (Milvus migrans)
• Japanese sparrowhawk (Accipiter gularis)
• Japanese paradise-flycatcher (Terpsiphone atrocaudata)
• Black paradise flycatcher (Terpsiphone atrocaudata)
• Fabriciana nerippe (F:Papilionoidea)
• Lethocerus deyrollei (F: Belostomatidae).

Plants

• Japanese strawberry tree (Cornus kousa ),
• Painted Maple (Acer pictum subsp. mono ),
• Juncus effusus
• Scripus triangulates,
• Persicaria hydropiper.
• Obovata peony (Paeonia obovata).

69 families, 136 genera, 181 species of flowering plants exist here.