Description
Lake Sommen is quite deep and most of the lake is ice-free all-winter. During this period large amounts of Stor Skallesluger, Hvinand and Toppet Lappedykker winter in Sommen. Sometimes in the hundreds. Among these Troldand, Knopsvane, Sangsvane, Blishøne, and Stormmåge can often be found. The lake is also home to quite a few rarer wintering birds like Sortstrubet Lom, Toppet Skallesluger, Kongeørn, Sortand, Fløjlsand, Isfugl, Rødstrubet Lom and Hættemåge.
During the spring migration marine ducks can be found in the lake. At the same time Rødstrubet Lom, and Sortstrubet Lom, arrive at the lake. Sortstrubet Lom breeds in the lake while Rødstrubet Lom feeds in the lake and breeds in small neighbouring lakes. The rare Hvidnæbbet Lom has been seen. Sommen archipelago hosts large colonies of Fjordterne, Stormmåge, Hættemåge, Sølvmåge, Fiskehejre and Skarv. Among these some rare birds like Sildemåge, and Havterne can be seen.
The large decidous forests around sommen especially on Torpön host plenty of quite rare birds like: Lille Fluesnapper, Lille Flagspætte, Nøddekrige, and Skovhornugle. Around Sommen there is also old conifer forests around which support large populations of woodpeckers. Vendehals, Grønspætte, Sortspætte, Lille Flagspætte, Tretået Spætte (very rare), Stor Flagspætte and Hvidrygget Flagspætte (extinct in the area) have all been recorded. Other otherwise rare forrest birds found here are: Hjerpe Tjur, Urfugl (Rocks mosse), and Nøddekrige.
During the autumn birds can be seen migrating through the lake. Most common are the doves, finches, terns, and waders. At Rocks mosse Urfugl and Tjur breed. At Visskvarn there are rapids where Vandstær, and Bjergvipstjert can be seen.
Details
Access
The area is quite vast, and has got many places to get a good view of the lake. The area is quite mountanous and a walk can be straining. Click on a P in the map to get directions to that point.

