Weaver buck ( Lamia textor )
|( Linnaeus , 1758)|
The massive beetle becomes 15 to 30 millimeters long. The whole body is black and has very short and fine gray-brown hair, so that it appears matt dark brown. On the elytra , which have clearly developed shoulders, there are yellowish-brown, irregularly distributed spots that are also due to short and thick hair. The head drops vertically, so the mouthparts point downwards. The eyes are very kidney-shaped. The antennae are shorter than the body in both sexes, and the first, thick antennae segment is noticeably truncated. The pronotum is roughly square and has two pointed cusps on the sides. The Weberbock is similar to the gray-winged Erdbock , but is significantly larger. In contrast to its relative, the wing covers are not fused.
The beetles occur in Europe , Siberia to Korea and Japan , in Central Europe from the plains to low foothills and valleys. They live in moist forests , especially in floodplains . They used to be reported as common, but they are rare today.
Way of life
The larvae develop over the course of three years in the lower parts of the trunk and roots of old willows (especially pollard willows ) and poplars (especially quivering poplars ). They feed first in the bast, then in winding corridors in the wood. After the 2nd hibernation, at the end of the feeding passage they make a doll's cradle with smooth walls and a layer of sawdust; the doll rest lasts one to two months. The hatched beetles can be found from the beginning of May to July. They sit on the trunk or the lower branches up to a maximum height of 2 m. Although they can fly well, they are very sluggish and prefer to crawl around on the ground and only become active in the evening. Then they feed on the leaves and through the bark on the bast of the branches of their breeding trees. In breeding they live over 300 days. The main enemy of the larvae are woodpeckers, which damage the trees more than the larvae themselves.
Hazard and protection
The striking decrease in the frequency of this species is certainly due to river regulations and the disappearance of bank vegetation. The beetle is protected under the Federal Species Protection Ordinance of December 19, 1986.
- H. Freude, KW Harde, GA Lohse: Die Käfer Mitteleuropas. Volume 9, Spektrum Akademischer Verlag, 1966, ISBN 3-8274-0683-8 .
- Adolf Horion : Faunistics of the Central European Beetles, Vol. XII . Überlingen-Bodensee 1974.
- KW Harde, F. Severa: Der Kosmos-Käferführer , Franckh, 1981, ISBN 978-3-440-04881-8 .