Chinese crested tern

The Chinese crested tern (Thalasseus bernsteini) is a seabird of the tern family, Sternidae, 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.

Contents

• Chinese crested tern taiwan matsu july 2008
• China fujian minjiankou chinese crested tern 201105 mating
• Threats
• References

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 Taiwan 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.