Oh, my word. Birds. Lots and lots of birds. Waders, to be exact. Knots, to be even more precise. I’d heard much of the Snettisham Spectacular, often touted as one of the UK’s top wildlife spectacles, but I’d been meaning to do this for years, but it was a challenge to get the timing right. This isn’t one of those things you could just set aside any weekend within a season for. Nope. To have a good chance of witnessing this phenomenon, you need a congruence of a few factors: extreme high tide, the right wind, the right timing for…