The Sibbersdorfer See is a

lake A lake is often a naturally occurring, relatively large and fixed body of water on or near the Earth's surface. It is localized in a basin or interconnected basins surrounded by dry land. Lakes lie completely on land and are separate from ...

in the district of

Ostholstein Ostholstein (; ) is a district in Schleswig-Holstein, Germany. It is bounded by (from the southwest and clockwise) the districts of Stormarn, Segeberg and Plön, the Baltic Sea and the city of Lübeck. Geographically, the district covers the vas ...

within the region known as

Holstein Switzerland Holstein Switzerland () is a hilly area with a patchwork of lakes and forest in Schleswig Holstein, Germany, reminiscent of Swiss landscape. Its highest point is the Bungsberg (168 metres above sea level).Carl Ingwer Johannsen & Eckardt Op ...

in the North German state of

Schleswig-Holstein Schleswig-Holstein (; ; ; ; ; occasionally in English ''Sleswick-Holsatia'') is the Northern Germany, northernmost of the 16 states of Germany, comprising most of the historical Duchy of Holstein and the southern part of the former Duchy of S ...

. It lies between Sibbersdorf and Fissau, north of the

Großer Eutiner See The Großer Eutiner See is a lake in Holstein Switzerland, Schleswig-Holstein, Germany. It lies northeast of the town of Eutin. It has an area of , is up to 17 metres deep and lies at a height of about . It northern side borders directly on ...

, near the town of

Eutin Eutin () is the district capital of Ostholstein, Eastern Holstein county located in the northern German state of Schleswig-Holstein. As of December 2022, the town had some 17,000 inhabitants. History The name Eutin (originally Utin) is of Slavic ...

. It has an area of , is up to 7 metres deep, lies at an elevation of about and is crossed by the

River Schwentine The Schwentine is a river in the North German state of Schleswig-Holstein. It is approximately long and rises on the hill of Bungsberg, the highest point in the state, near the village of Kasseedorf in Ostholstein. It then runs from its source t ...

Gull island

There is a

gull Gulls, or colloquially seagulls, are seabirds of the subfamily Larinae. They are most closely related to terns and skimmers, distantly related to auks, and even more distantly related to waders. Until the 21st century, most gulls were placed ...

island, about 5,000 square metres in area in the Sibbersdorfer See. Until it was sold in 1988, gull eggs were collected here. When this practice ended, the island became increasingly overgrown as it was no longer mown. The

Malente Malente is a municipality in the district of Ostholstein, in Schleswig-Holstein, Germany. It is about 5 km northwest of Eutin and 35 km north of Lübeck. The cities belonging to this municipality are Timmdorf, KreuzfeldNeukirchen Siev ...

Bird Conservation Group took over this maintenance function in 1995 and the number of breeding pairs increased again.

Reed bunting The common reed bunting (''Emberiza schoeniclus'') is a passerine bird in the Emberiza, bunting family Emberizidae, a group now separated by most modern authors from the finches, Fringillidae. The genus name ''Emberiza'' is from Old High German, ...

s and

reed warbler The ''Acrocephalus'' warblers are small, insectivorous passerine birds belonging to the genus ''Acrocephalus''. Formerly in the paraphyletic Old World warbler assemblage, they are now separated as the namesake of the marsh and tree warbler famil ...

s have no longer bred here since the end of the 1990s. In 2004 1,051 breeding pairs of birds of 19 species were counted, including: 750 pairs of

black-headed gull The black-headed gull (''Chroicocephalus ridibundus'') is a small gull that breeds in much of the Palearctic in Europe and Asia, and also locally in smaller numbers in coastal eastern Canada. Most of the population is migratory and winters fu ...

s (1996: 50 pairs), three pairs of

Mediterranean gull The Mediterranean gull (''Ichthyaetus melanocephalus'') is a small gull. The scientific name is from Ancient Greek. The genus ''Ichthyaetus'' is from ''ikhthus'', "fish", and ''aetos'', "eagle", and the specific ''melanocephalus'' is from ''mel ...

s, 22 pairs of

common tern The common tern (''Sterna hirundo'') is a seabird in the family Laridae. This bird has a circumpolar distribution, its four subspecies breeding in Temperateness, temperate and subarctic regions of Europe, Asia and North America. It is stron ...

s, 15 pairs of

Canada geese The Canada goose (''Branta canadensis''), sometimes called Canadian goose, is a large species of goose with a black head and neck, white cheeks, white under its chin, and a brown body. It is native to the arctic and temperate regions of North ...

, one pair of

oystercatcher The oystercatchers are a group of waders forming the family (biology), family Haematopodidae, which has a single genus, ''Haematopus''. They are found on coasts worldwide apart from the polar regions and some tropical regions of Africa and Sout ...

s, two peewit pairs, 12 pairs of

graylag geese The greylag goose (''Anser anser'') is a species of large goose in the waterfowl family Anatidae and the type species of the genus '' Anser''. It has mottled and barred grey and white plumage and an orange beak and pink legs. A large bird, it m ...

, 49 pairs of

tufted duck The tufted duck (or tufted pochard) (''Aythya fuligula'') is a small diving duck with a population of nearly one million birds, found in northern Eurasia. They are partially migratory. The scientific name is derived from Ancient Greek , an unide ...

and a pair of

mute swan The mute swan (''Cygnus olor'') is a species of swan and a member of the waterfowl family Anatidae. It is native to much of Eurasia, and (as a rare winter visitor) the far north of Africa. It is an introduced species in North America, home to ...

s. Lakes of Schleswig-Holstein LSibberstorfer See {{SchleswigHolstein-geo-stub