Both Penghu and Maoyu are located in the tropics so the large number of Nordmann's terns which have nested and proliferated there for many generations is remarkable. On Maoyu, the bridled tern and the Philippine noddy make up approximately 99 percent of the gulls.
在貓嶼，白眉燕鷗和玄燕鷗約佔了燕鷗總數的百分之九十九。冬天它們大多會離開一陣子，至於是去遠洋覓食，或是到南方度冬，尚未得到證實。