Aradus betulae
Local name: Birkebarktæge
Photo: iNaturalist: (c) Vladimir Bryukhov, some rights reserved (CC BY-NC), uploaded by Vladimir Bryukhov
Overview
Birkebarktæge (Aradus betulae) is a specialized bark bug that feeds exclusively on birch trees, particularly favoring older specimens with thick, furrowed bark. These flattened, brownish insects measure 4-6mm in length and are perfectly adapted to living in the crevices of birch bark where they feed on fungal growth and decaying organic matter. They play an important ecological role as decomposers in birch forest ecosystems and serve as prey for various insectivorous birds and spiders.
Aradus betulae faces significant threats primarily from habitat loss due to deforestation and forest fragmentation, which reduces the availability of its host birch trees. Climate change poses additional risks by altering the distribution and health of birch forests, while pollution and pesticide use in forestry practices further compromise population stability.
Habitat
This species inhabits birch forests and woodlands where it lives under the bark of birch trees (Betula species), particularly favoring mature and old-growth birch stands. It is typically found in boreal and temperate forest ecosystems across northern Europe where birch trees are prevalent.
Other threatened species in Aradidae
Threatened in Åland Islands
Frequently asked questions
Why is Birkebarktæge classified as Vulnerable?
Where does Birkebarktæge live?
What are the main threats to Birkebarktæge?
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