Big thyroid gland
Family: Thyroid glands (PELTIDAE)
Look: Peltis grossa
Category: IV category
Description. Has length of 11-19 mm, very wide and surprisingly flat. Meets on sublime places. Coloring brown or black-brown, top side of a body slabovypukly, lower - flattened. The forward back strongly cross and very short, with the maximum width in back corners (is three times wider than the length), is in front strongly narrowed, its first line is cut deeply out, and sides are flattened and bordered. Wing sheaths with 3 longitudinal Kiel, a strong punktirovka between them, the flattened side edge and top.
Distribution and status. This look meets also in Norway, Finland, in the central part of Europe. The number of a look was strongly reduced recently. It is widespread in places where trees suffered from the bark beetle for a long time.
Ecology. Development of larvae happens in dead coniferous and deciduous trees, as a rule, in snags of a fir-tree and in birch stubs. Larvae meet also in pines, an aspen, a gray and black alder. Larvae develop about 3 years. The hatched bugs often winter under friable bark.
Completely created bug sits under loose pieces of bark in the afternoon, and at night becomes active and creeps on stubs. Major factors of threat: the decreasing stocks of an old birch, a dead wood, wildfires, sanitary deforestation.
Protection measures: In the woods it is important to keep dry trees, first of all pines and birches.