Rare. Elusive. Nocturnal. Aquatic. None of these words caused me to brim with confidence as I drove west recently in search of Scotland’s newest wildlife resident. Knapdale Forest in Argyll was chosen as the site for the Scottish Beaver Trial, a 5-year investigation into the impact of beavers on their habitat and their potential as a boost to rural tourism. Back in 2009, 16 beavers were brought from Norway and via a 6-month quarantine and various medical checks, were released into a number of freshwater lochs surrounded by willow, hazel, alder and oak.