. The rosalia longicorn is long. The
antennae can be up to twice as long as the rest of the body in males, and the same length in females. The
elytra are flat, blue-gray, with variable black spots, including a prominent one on the
thorax, a silky one in front, and a small one in back. Both the antennae and the legs have the same coloration as the body. The coloration serves as good
camouflage with their preferred habitat, the
European Beech. They are distributed from
Cantabrian Mountains east to
Caucasus. Its numbers across Europe has greatly depleted in recent years, and it is a protected species in
Germany,
Hungary,
Italy,
Poland,
Serbia, and
Slovakia. The adults are active from June to September. By day the beetles sit near flowers and feed on the
pollen. They are able to make a chirping sound by scraping their rear legs and elytra together. After mating, the female lays the eggs within a crack in the bark of
beech trees. The
larva eats the bark and
pupates there as well when it has reached about three years of age. The mature adult emerges from the pupa and then have a further lifespan of three to six weeks. Rosalia longicorn is the logo of
Danube-Ipoly National Park in
Hungary. ==References==