Fauna
Fish
The most common species are roach, perch and pike. Other species
that can be found are ide, tench, stickleback and burbot. Salmon trout
can be found in the River Slafsan, east of the lake. The common bream
used to be plentiful, but it disappeared when the level of the lake
was lowered in 1912.
The freshwater crayfish has been introduced to both the River Hornborga
and River Flian. The original crayfish has disappeared.
Mammals
The elk, previously a character species in the forests and bushes
around the lake, declined dramatically in conjunction with the restoration
and raising of the water level.
On the left side, the occasional red deer can be seen. They originally
escaped from enclosed pastures.
Nowadays, beavers are frequently seen in the areas around the lake.
There are also large numbers of mink and marten in and around the
lake. Dormouse nests have been found at Ore nabb.
Needless to say, there are a number of species of bat around the
lake, including the long-eared bat.
Frogs and reptiles
The moor frog, common frog, toad, small water salamander, wood lizard,
copper lizard, grass snake and adder have all been seen here.
We particularly recommend the shiny blue moor frog's plopping performance
during the first warm days at the beginning or middle of April.
The foot-bridge at Hornborga Naturum and the ponds south of Ängsladan,
along the walking track known as Ytterbergsleden, are usually the
site of entertaining frog displays during a few short and intensive
spring days.
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