Plenty BOP around here, so that could be the reason. When the hay is being cut, I can easily count 12 to 14 Buzzards. Occasionally see the Peregrine and fairly often see the Sparrowhawk.
They've been out on good days and are not forced. They won't come in when I shout, only when they are ready, then they trap fast. Last year they flew 2 hours before coming in.