Arboretum Zürich to the ground. Inside the group of trees are also powerful green-leaved trees, but also the purple "Fagus sylvatica f. purpurea", and the outer ends form narrow-leaved Beeches. In the summer when the trees are in full leaf, they form a 'tree cathedral', in those shadows reigns a soothing coolness and soft twilight. Since 2006 an open gap in the middle of the group, as the central Beech unfortunately had to be cut. The death of the otherwise durable Beech is also a result of poor soil conditions, which occur on the artificial lake shore bed. Just steps away, there
Stigmella hemargyrella Stigmella hemargyrella Stigmella hemargyrella is a moth of the Nepticulidae family. It is found in most of Europe, except Iceland, Norway, Finland, Portugal and most of the Baltic region. The moths (imago) are bivoltine flying from April to May and again from July to August and can be found resting on trunks. The wingspan is 5–6 mm. The egg can be laid on either side of the leaf and the pale yellowish-white larva feed, within a mine on "Fagus sylvatica" and "Fagus sylvatica orientalis". The mine is a sinuous gallery and at the early state is relatively narrow with a