Special house guests took up residence at one of Pembrokeshire's best known Norman fortresses. A family of blackbirds became an unusual tourist attraction among the ancient stones of Carew Castle. Visitors and staff at the castle - which is run by the Pembrokeshire Coast National Park Authority - followed with great interest the day-by-day development of the four fledglings. Their nest site could not have been in more public view - right on a busy walkway - but the hard working parents were oblivious of all the visitor interruptions. "It was exciting to watch," said castle guide Des Brown. "The nest was in a putt-log hole - basically just an aperture in the old tower wall - right next to where visitors constantly pass. "We thought the birds would abandon the nest, but the parents successfully raised four youngsters and were back and fore feeding all the time. "To protect the nest site warden Dave Reynolds put a metal grille over part of the aperture. This allowed the parents to fly in and out freely, but prevented hands being put into the nest and disturbing the nestlings. "The youngsters have now flown and we will miss our special house guests," added Des. "Perhaps the parent birds will be back to raise a second brood!"