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Invasive Flatworm Confirmed in Austria, Raising Alarm Over Soil Health

Genetic confirmation in Tulln prompts fresh calls for public reporting and plant-trade vigilance.

Overview

  • Researchers at NHM Vienna and the University of Innsbruck genetically confirmed four Obama nungara specimens collected at a nursery near Tulln between November 2022 and August 2024.
  • The species is now recorded across multiple European countries, with France reporting widespread presence and more than 1,500 individuals collected from a single garden in one month.
  • The predatory flatworm eats earthworms, snails, insect larvae and woodlice and has few natural enemies, fueling concern about impacts on soil processes and agriculture.
  • Experts cite the ornamental plant trade and freight transport as the likely introduction routes, with climate warming expected to expand suitable habitat in Central Europe.
  • Authorities and conservation groups urge checks of potted plants and photo-documented reports to platforms such as iNaturalist or Naturgucker, advising against cutting specimens and recommending soapy water for removal.