The vexing aspect is just how hard it is to avoid disturbing them. What is serendipitous is that once one discovers the terns 'resting grounds, one can catch an intimate glimpse of the splendid pageantry of a large flock of birds.
這種習性讓生態記錄者既憂且喜：憂的是不知如何避免驚擾它們；喜的是一旦找到燕鷗棲息地，便可親睹群鳥聚居的壯觀場面。