Does anybody know what birds of prey commonly fly above the M40 motorway in Oxfordshire?
There were as many as four seen at a time above the verges. The passenger in the the car did say they had forked tails and were quite large.
They're likely to be Red Kites (Milvus milvus). There was a very successful reintroduction not far away and now they are well established. I have seen circling flocks of twenty plus gather almost every time the ride on mower was brought out to cut a meadow near Stokenchurch. They knew that grass-cutting meant plenty of creatures exposed and homeless or newly dead, ready for feasting on.
My passenger did say he had read that there had been a re-introduction. It makes good sense to me now.
most probable by description and location