Slivnica: the Plum Mountain

From Mount Slivnica in Slovenia, you have the best view over the famous Lake Cerknica, but beware of the witches!

Mount Slivnica, where the Witches Gather

Just northeast of Lake Cerknica you find Slivnica, the Plum Mountain. This is where witches gather to cast their spells … At night, lightning strikes here and on cold mornings you can see a small plume of warm air, in the form of a tiny cloud. When something bad happens in the valley, you can be sure that those witches are to blame. When you join us on our tours, I may tell you the real story behind the small clouds of steam on the mountain …

A Low-altitude Tree-line

Most of the surrounding low mountains are covered with forest straight to the top. In contrast, on Slivnica there appears to be a tree-line. This is not because of its height: with 1114 meter, the mountain is hardly higher than the surrounding mountaintops. Instead, the open vegetation is caused by summer grazing with cattle and horses, and which also continues today. However, the grazing practices have changed from herding with a shepherd to a more intensive grazing in a fenced area. Within the fence, grazing is intensified and part of the grassland is even fertilized. Outside of the fence, grazing is abandoned and the vegetation is rapidly changing into a forest. In addition to the grazing, there are several flower-rich hay-meadows, which are well worth looking at.

From the top of Slivnica, you have the best view over Lake Cerknica!

Hiking Trails

There are several hiking trails and an unpaved road leading to the top of Slivnica and local inhabitants like to hike up during weekends. In contrast, you will meet few foreign tourists: this is well away from the known hiking destinations of the higher mountains. On top, there is a mountain hut which, in all honesty, looks like it best days are past. It is open on weekends in summer, when I go there myself it is usually closed. Quite often, I am here all alone.

The biggest attraction of Slivnica is, without doubt, the terrific view. From here, you can oversee the entire Cerknica valley as if you are looking at a map of the area. The Cerknica valley is periodically flooded in this way the intermittent Lake Cerknica is formed. Because of this, the view of the valley is never the same!

On the top of Slivnica, we may see the Carniolan Lily, which in Slovenian has the nickname “Golden Apple”.

Flora and Fauna of Slivnica

The slopes of Slivnica are largely covered with Beech forest, and in some parts, there is Spruce planted. Birch and Pine mark the forest edges. On the formerly grazed parts at the top, Laserwort marks an intermediate stage in the succession from grazed meadow to forest. In between, there are a few Carniolan Lilies: a beautiful orange flower which occurs in isolated populations on the higher parts of the Notranjska region. In fall, isolated Rowan trees colour beautifully with yellow leaves and bright orange berries.

Special Grasshoppers and Bush-crickets

On the top of Slivnica, there are several remarkable grasshopper and bush-cricket species, which appear to have isolated populations because they cannot disperse through forests. These include the Foothill Mountain Grasshopper and the Eastern and Dalmatian Saddle Bush-cricket. All three can be found in quite many parts of the Notranjska region. This is not the case for the Large Mountain Grasshopper, a largely Alpine species which occurs on a few mountain tops in the region and on part of the Bloke plateau. You may notice Large Mountain Grasshoppers when they fly up in front of your feet with loudly rattling, black wings.

The Large Mountain Grasshopper stands out when it flies up with loudly rattling wings. It is common in the Alps but has a few populations in Southern Slovenia as well. 

Lost Lizards?

The mountain hut has been partly constructed with local limestone rocks. At a little distance from the hut, there is a hole in the landscape of maybe 30 meter in diameter: this is where the construction material came from. This hole is rocky, with some wild Rose-bushes. On sunny days, Wall-lizards are active here, and nowhere else on Slivnica. How they came here is not clear, perhaps they have been transported with construction material in the past. The nearest populations are along an unpaved road underneath Slivnica, and these are separated from the top by a wide expanse of dense forest. Alternatively, these wall lizards might be a remnant from a time when the slope was more open and cattle grazing influenced a much wider area.

Join us on Slivnica!

At most of our tours, we will at least visit Lake Cerknica, from where you can see the summit of mount Slivnica. Since the mountain is so close by, we might well drive up to the top during our Nature Tour. Also, you can be sure that we go here on our specialised Grasshopper Study Tour!

 

On the top of Slivnica, there is an interesting, small population of Wall Lizards, which appears to be totally isolated from other populations of this species. 

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