Orlången Nature Reserve is a nature reserve

Nature reserve

A nature reserve is a protected area of importance for wildlife, flora, fauna or features of geological or other special interest, which is reserved and managed for conservation and to provide special opportunities for study or research...

 surrounding Lake Orlången

Orlången

Orlången is a lake in central Huddinge Municipality, just south of Stockholm, Sweden.Orlången, one of the lakes in the Tyresån Lake System, forms part of the Orlången Nature Reserve.- Catchment area :...

 in central Huddinge Municipality

Huddinge Municipality

Huddinge Municipality is a municipality in Stockholm County in east central Sweden. Its seat is located in Huddinge, which is a part of Stockholm urban area.The municipality is the second most populated in Stockholm County....

, south of Stockholm

Stockholm

Stockholm is the capital and the largest city of Sweden and constitutes the most populated urban area in Scandinavia. Stockholm is the most populous city in Sweden, with a population of 851,155 in the municipality , 1.37 million in the urban area , and around 2.1 million in the metropolitan area...

, Sweden

Sweden

Sweden , officially the Kingdom of Sweden , is a Nordic country on the Scandinavian Peninsula in Northern Europe. Sweden borders with Norway and Finland and is connected to Denmark by a bridge-tunnel across the Öresund....

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There are four lakes within the reserve: Trehörningen (Sjödalen)

Trehörningen (Sjödalen)

Trehörningen is a small lake located in the municipality Huddinge in southern Stockholm, Sweden. As part of the Tyresån lake system, Trehörningen receives water from Lake Gömmaren and supplies water to Lake Ågesta.- History :...

, Ågestasjön

Ågestasjön

- External links :...

, Orlången

Orlången

Orlången is a lake in central Huddinge Municipality, just south of Stockholm, Sweden.Orlången, one of the lakes in the Tyresån Lake System, forms part of the Orlången Nature Reserve.- Catchment area :...

, and Mörtsjön.

The reserve, founded in 1998, encompasses a total area of 15 square kilometres, of which 12 km² is land dominated by a system of rift valley

Rift valley

A rift valley is a linear-shaped lowland between highlands or mountain ranges created by the action of a geologic rift or fault. This action is manifest as crustal extension, a spreading apart of the surface which is subsequently further deepened by the forces of erosion...

s characteristic for South Stockholm

South Stockholm

Söderort is the southern suburban part of Stockholm Municipality, Sweden...

. The central part of the reserve is dominated by old agricultural lands and pastures, with preserved mansions and homesteads dating back to the 18th century. Lake Ågestasjön

Ågestasjön

- External links :...

 in the north-eastern end of the reserve is one of the most important bird resting locales and breeding grounds in Stockholm County

Stockholm County

Stockholm County is a county or län on the Baltic sea coast of Sweden. It borders Uppsala County and Södermanland County. It also borders Mälaren and the Baltic Sea. The city of Stockholm is the capital of Sweden. Stockholm County is divided by the historic provinces of Uppland and Södermanland...

. Throughout the reserve there are a multitude of rare flora and fauna, making it important for regional biodiversity

Biodiversity

Biodiversity is the degree of variation of life forms within a given ecosystem, biome, or an entire planet. Biodiversity is a measure of the health of ecosystems. Biodiversity is in part a function of climate. In terrestrial habitats, tropical regions are typically rich whereas polar regions...

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