What is worse than hail stones for a bald head....when Arctic terns attack...

Arctic terns are incredibly beautiful, graceful birds that pass through at this time of year on the way back to their breeding grounds and I have seen small groups of them stopping to feed and rest at Wilstone reservoir near Tring in Hertfordshire over the last week or so, mixing with the local common terns and occasional little gull. Their graceful appearance does  mask a more belligerent side to their temperament and if you approach their nest they will attack without fear, pecking your head and often drawing blood. It has happened to me only once but it was not a pleasant experience.....especially with a bald head!