Not every species introduced by humans becomes a problem – but some do, especially on islands. In this episode of Inside Biodiversity, invasion biologist Marten Winter (iDiv and Leipzig University) explains how we define alien vs. invasive alien species, why the raccoon is a management challenge for Europe, and why management is particularly tricky in places like Australia. We also discuss the ethical dilemmas of controlling species such as the red fox – and whether it is possible to identify non-native species without knowing their origin.

Related links:

Dr Marten Winter on the iDiv website:

“How we move (alien) species around the world” – TEDx talk:

“Don't judge species on their origins” – This comment in the journal Nature sparked several contesting replies:

IPBES Invasive Alien Species Assessment: Summary for Policymakers:

Host: Dr. Volker Hahn, Head of Media and Communications at iDiv