She was feeding in a field accompanied by another bird which seemed to be her offspring from last year, and immediately flew up and landed on the opposite side of a fencepost to two walkers who were passing by, so that she was invisible to them. I watched this from a distance but then managed to get much closer, until she spotted me and did exactly the same thing again, occasionally peering around the side to check if I was still there. I only managed to fool her into thinking I'd gone by hiding behind a bush, upon which she promptly dropped down into the field and resumed feeding again.
This very vocal Grey Wagtail, on the other hand, was doing its best to distract me since I think I may have located its nestsite in some thick ivy.
