On a windy fine day in April 2018, after leaving Torrejon el Rubio, the last inhabited village in a vast green undulating landscape that forms the South-Eastern approaches to Monfrague National Park, Extremadura, we set off to explore the park’s birdlife. The UNESCO recognised park, with 18,396 hectares in its core area around the confluence of the Tagus and Tielar rivers, was the first space to be protected as a biosphere in Extremadura, being declared a Natural Park in April 1979. It's...