The expression "the ugly duckling becomes a swan" sums up how some people feel: Geese and swans may belong to the same family as ducks, but their long necks make them far prettier.
醜小鴨變天鵝，雖然天鵝屬於雁鴨科裡的另一類，但顯然長脖子在審美上較為吃香。