Uholka-Shyrokyi Luh primeval beech forest area, were surveyed. Within each plot, all trees with a diameter at breast height (DBH) of 6 cm and more were measured. 97% of all the 6779 trees measured were European beech ("Fagus sylvatica" L.). The oldest beech trees were nearly 500 years. The largest tree was a wych elm ("Ulmus glabra" Huds.) with a DBH of 150 cm, whereas the largest beech tree had a DBH of 140 cm. 10 beech trees per hectare had a DBH of at least 80 cm. The number of living trees consisted of 435 trees per hectare with a basal area of 36.6
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