Adrian Wolf is not studying just one bird, not anymore. He manages forests in western Washington state. He is stewardship director for the Great Peninsula Conservancy, and he relies on bird sounds to measure his work. He thinks of it like the birds are leaving reviews. WOLF: This habitat is good. I'm going to keep coming back here, and I'm going to keep reading. That's the best yelp review you can have is you come back.
At first, the stoat looks like a faint smudge in the distance. But, as it jumps closer, its sleek body is identified by a heat-detecting camera and, with it, an alert goes out to Orkney's stoat hunters. Aided by an artificial intelligence programme trained to detect a stoat's sinuous shape and movement, trapping teams are dispatched with the explicit aim of finding and killing it.