We’ve never seen seagull nests before, believing them to nest on cliffs etc, a number of the houses had groups of nests on windowsills and ledges, with young in them. How the home dwellers put up with the constant noise that emanated from the nest occupants at an unbelievable level I will never know, particularly, as we have found to our cost up here where there is 24 hour day light the seagulls scream for 24 hours a day.