The 22nd May 2009 is 'The International Day for Biological Diversity'. For 2009 the theme is Invasive Alien Species (IAS) – a major threat to biodiversity and food production – and a research and knowledge provision area that we here at CABI are are highly skilled in. The majority of our scientists time is spent tackling various IAS and mitigating their impact on agriculture and the wider environment. In addition our publishing team put together a detailed range of products, including the CAB Abstracts database subset on invasives, Major texts on Invasives (print and e-book) and also we are developing with the assistance of a consortia of international donors the Invasive Species Compendium for launch in 2010.