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Location Taiwan (China), Penghu
Central coordinates 119o 32.00' East  23o 43.00' North
IBA criteria A4i
Area 816 ha
Altitude 0 - 17m
Year of IBA assessment 2004

Chinese Wild Bird Federation

Site description Extent of this site: comprised of N. Tiechen, Gupoh, Tudigong, and Baisha, as well as the islets between Baisha Islet and Jibei Islet. These are all square basalt terraces. The biggest deserted islet in Penghu is Gupoh Islet with total area of 21 ha, being 1 km long and 0.3 km wide. The islet is a square terrace formed with 4 land blocks and 3 isthmuses. There are natural white sand beaches both north and south on its eastern coast. The area from the northwest to the northeast of the islet is made of basalt, which is also a famous source for layer. Tiechen Islet has cliffs on all sides. On its north side is a magnificent landform of a wave erosion hole. This islet used to be a military range, so broken rocks cover its surface. In the south there is a small area where red soils of weathered basalt can be found. Baisha and Wugong Islets are together known as Tudigong (Earth God) Islet. The largest unique landform is a huge sand dune in the south, which is on the lee side of a basalt sea cliff. The entire islet of Wugong is formed of dense dark basalt. It is situated 500 m to the east Baisha Islet. In summer, many species of gulls and terns roost and breed in this area, but flocks are dominated by Bridled Terns. The Bridled Terns here constitute the largest group than any other places on the North Sea Islets.

Key Biodiversity IBA A4iii Criterion Species: include a variety of gulls and terns breeding in summer. • Bridled Terns roost and breed on N. Tiechen Islet in summer, with numbers commonly reaching 700-800 birds. In August 1998, about 1,000 birds were recorded in June 1997, 450 Roseate Terns were recorded. • In addition to the 2 terns mentioned above, 12 other species are found in this area. The following 5 species are protected: Asian Crested Goshawk, Little Tern, Bridled Tern, Black-naped Tern, and Common Noddy.

Populations of IBA trigger species

Species Season Period Population estimate Quality of estimate IBA Criteria IUCN Category
Roseate Tern Sterna dougallii breeding  1997  450 individuals  good  A4i  Least Concern 
Bridled Tern Onychoprion anaethetus breeding  1998  700-1,000 individuals  good  A4i  Least Concern 


IUCN habitat Habitat detail Extent (% of site)
Sea   major
Coastline   major

References • Lin, C. H. et al. 1991. Geology and landforms of the Penghu Archipelago. Taiwan Provincial Education Board. • Jeng, C. S. 1999. Avian Resources of the Penghu Archipelago. Penghu County Government. • WBFT. Bird Database.

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Recommended citation  BirdLife International (2016) Important Bird and Biodiversity Area factsheet: Northern Sea Islets. Downloaded from on 26/10/2016

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