LONGLISTED FOR THE WAINWRIGHT PRIZE FOR WRITING ON CONSERVATIONInvestigating the ethical and practical challenges of one of the greatest threats to biodiversity invasive species.Across the world invasive species pose a danger to ecosystems. The UN Convention on Biological Diversity ranks them as a major threat to biodiversity on par with habitat loss climate change and pollution.Tackling this isnt easy and no one knows this better than Hugh Warwick a conservationist who loathes the idea of killing harming or even eating animals. Yet as an ecologist he is acutely aware of the need at times to kill invasive species whose presence harms the wider environment.Hugh explores the complex history of species control revealing the global movement of species and the impacts of their presence.