This maybe the cause of yancy,s shadow,s ,
Gorse and heather require management intervention or they become leggy and degenerate .As they compete for light ,gorse and heather will grow and cast shadow,s and hide the natural topography of the dunes .Gamekeeper,s will burn or cut by chainsaw leaving more bare sand .Stoat,s and weasel,s also f eed heavily on the course marking the ground by stripping the grass so all these put together maybe the cause of dark unexplained shapes and shadows .