There are a number of Stone Curlews in the Stonehenge area. I first came on to them by accident as i was looking for a Yellow Hammer!
I then visited a while later and saw them again. Another HOS lister has also seen them in the same location. I was within 15m of them and had superb views but needed to be very very still as they got spooked very easily.
Both times i was on a public RoW and stayed on the RoW, not needing to move of it to get my views.
For you Teamsaint as you do not drive catch the train to Salisbury, then catch the bus to Stonehenge, then you have to walk.