Not long ago I was travelling down the motorway towards the Northampton area.Along the side of the road there were farmers fields with gulls and crows looking like they were scavenging for food. Amongst them were 4 or 5 huge birds of prey. I instantly noticed their forked tails which led me to think of red kites but I only got a brief look. They were definately not a bird i've seen before. Is it likely that I sighted more than one of these birds in such an area(on the edge of a motorway) or have I mistaken them for something else?