The Sauberge, which reach their highest point at Hammerstein's Höhe ( NN) and are the source of several tributary streams for the river Lamme, are crisscrossed by numerous trails and forest tracks; but there are no roads across the unpopulated ridge. Part of the B 243 federal road cuts through the middle of the hills, running between the villages of Wesseln and Nette. There is an eighteen-hole golf course on the northern slope of Hammerstein's Höhe. Access to the hills is restricted by a hunting preserve, where a herd of fallow deer is kept. The wild boar population is relatively large. Amongst the most important species of bird are the middle and lesser spotted woodpeckers, the European green woodpecker and the grey-headed woodpecker. A high density of breeding red kites live around the edges of the forest, especially in the east and south. Buzzard, goshawk, sparrowhawk and hobby also breed here. Amongst the more numerous songbirds are firecrest, crested tit, wood warbler, tree pipit and common crossbill.