Grammotaulius nitidus
Local name: kalvasviirusirvikäs
Overview
The kalvasviirusirvikäs (Grammotaulius nitidus) is a caddisfly species whose larvae construct distinctive cases from small stones and sand grains in cold, clear water environments. Adults are characterized by their golden-brown wings with intricate venation patterns and emerge during brief summer periods. This species plays a crucial role as both a detritivore in its larval stage and as prey for fish, birds, and other aquatic predators.
Grammotaulius nitidus faces severe population declines primarily due to habitat degradation from water pollution, agricultural runoff, and urban development affecting its freshwater ecosystems. Climate change is altering water temperatures and flow patterns in the streams and rivers this caddisfly depends on for reproduction and larval development.
Habitat
This species inhabits pristine, cold-water streams and springs with rocky substrates and consistent year-round temperatures below 15°C. The larvae require well-oxygenated waters with stable flow patterns and abundant organic matter deposits among cobble and gravel beds.
Other threatened species in Limnephilidae
Threatened in Austria
Frequently asked questions
Why is kalvasviirusirvikäs classified as Endangered?
Where does kalvasviirusirvikäs live?
What are the main threats to kalvasviirusirvikäs?
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