I find sanderling a delight to watch when visiting Titchwell beach. These little waders trot along the shoreline, occasionally pausing to nibble at some morsel of food they've spotted.
On one occasion I was kneeling down behind my camera mounted on its tripod (to get a better angle of shot) and one little chap wandered right up to me, quite fearless, until he was too close to focus on. Just at that moment my phone pinged, he looked up, changed course slightly and just hurried on along the shore.
I like to photograph waders from as low an angle as possible so that the camera is close to eye level of the subject.