Two or three eggs are laid in each nest, and the male and female take turns incubating them and feeding the young. The fledglings stay with their parents for four or five weeks before going their own way.
燕鷗每巢約生二至三個蛋，雌、雄鳥一起輪流孵蛋、育雛。幼鳥大都要靠雙親養育四、五周以上才能夠獨立。