黑嘴端鳳頭燕鷗（學名：Thalasseus bernsteini） ，也稱作中華鳳頭燕鷗或黑嘴鳳頭燕鷗，是燕鷗科的一種海鳥，種名來自德國動物學家 Heinrich Agathon Bernstein；模式標本編號 RMNH 87602。
本種為一極危物種，在1999年（至少一隻混雜於大鳳頭燕鷗群中）與2000年（一個大鳳頭燕鷗群集附近發現四頭成鳥和四頭雛鳥）馬祖列島的中島上發現紀錄以前，在文史記載上，已經逾百年未出現過，使其曾一度被認為已經絕種，故有「神話之鳥」之稱。於此之前，在中國大陸（山東省北部海岸、福建省閩江口）、菲律賓、泰國、印尼、和沙勞越也曾有它們的蹤影。其數目的下降被歸咎於濫採鳥蛋。牠們能夠在馬祖存活，可能的原因是馬祖過去為一處軍事禁區，進入當地被限制有關。目前馬祖將黑嘴端鳳頭燕鷗訂為縣鳥，並劃設了一燕鷗保護區。
座標 / Coordinates
N24 59.193 E121 33.909
The Chinese crested tern (Thalasseus bernsteini) is a tern in the family Laridae, closely related to the Sandwich tern, T. sandvicensis, and the lesser crested tern, T. bengalensis. It is most similar to the former, differing only in the bill pattern, which is the reverse of the Sandwich tern's, being yellow with a black tip. From the lesser crested tern, which it overlaps in wintering distribution, it can be told by the white rump and paler grey mantle, as well as the black tip to the bill, which seen from up close also has a white point. The larger greater crested tern is also similar, differing in its stouter, all-yellow bill and darker grey mantle and rump, as well as in size.
It is a critically endangered species, previously thought extinct, with a mere four pairs rediscovered in 2000, nesting in a greater crested tern colony on an islet in the Matsu Islands (territory governed by Taiwan), just off the coast of Fujian Province, China, and wintering south to the Philippines. In the past, it had a wider distribution off the Chinese east coast north to Shandong Province. The decline is thought to be due to past hunting and egg collection for food. Past protection of this colony may be because of the islands' disputed status, administered by Taiwanese government (as part of Fujian Province of the ROC) but claimed by mainland China, the military sensitivity of the area restricting access. The islet has now been declared a wildlife sanctuary. It is possible that other small colonies may yet be found off the Chinese and Taiwanese coasts; migrant birds have been seen near the mouth of the Pachang River. The total population is speculated to be less than 50 birds.
The species is therefore the county bird of Lienchiang County (Matsu Islands).
REF: Wikipedia, 交通部觀光局網站