Unlocking Nature's Secrets: The Serengeti Rules (BBC4), available on BBC iPlayer for the next two months:
Based on an earlier book (Carroll, S.B. (2016) The Serengeti Rules: The Quest to Discover How Life Works and Why It Matters. Princeton University Press), this award winning film is beautifully photographed and explores the development of the ecological concept of keystone species by Bob Paine in the 1960s and its potential for ecosystem recovery.
When I was deeply depressed about the state of nature in the 1970s I couldn't imagine that in the 21st Century otters would once again be swimming up my local streams. Beavers, pine martens and wild boar are back in England and they are spreading fast (when will we get the first beaver in VC55?), and the rewilding lobby is pushing for the introduction of top predators such as the lynx and even wolves. I still find it difficult to imagine wild wolves back in the UK, but if you watch this programme, you'll understand why we might want them.