Guardian: The last time I took the ferry from Ullapool to the Isle of Lewis, the weather was glorious. I sat up on deck with my colleagues from the Scottish Wildlife Trust enjoying the sunshine, and the crystal clear views of the astounding landscapes of Scotland’s north-west coast. One of the things that struck me about my fellow passengers was the sheer number with binoculars slung around their necks. It reminded me just how popular wildlife watching has become in recent decades and, in turn, how …