A lot of us learned basic ecology in primary school. Maybe we took a biology class in high school or secondary school and dug in a little more. We use terms like "niche" but do we really know what they mean? How much complexity does that little word cover, if you start to unpick it? We are joined by Tim Blackburn, Professor of Invasion Biology at University College London and author of the book "The Jewel Box: How Moths Illuminate Nature's Hidden Rules", where he combines his years of working in the field of ecology with his love for catching moths, and helps us understand the many, many layers of complexity at work in the ecosystems around us.