Mongabay: Chile is probably best known for its volcanoes, earthquakes and the formidable peaks of the Andes, but as a country that spans 4,300 km (2,670 miles) from top to bottom, it also boasts a huge variety of bird life. And, until recently, it was home to what was thought to be the largest population of black-necked swans (Cygnus melancoryphus) in South America. Not long ago, these swans, as well as 100 other species of rare or vulnerable bird species, could be seen nesting in the Carlos Anwandter Nature...