Chek Chau

Port Island or Chek Chau is an island of Hong Kong, under the administration of Tai Po District. It is located in Tolo Channel, in the northeastern New Territories. Its name literally means red island; after the sedimentary rocks rich in iron that form this island. and volcanoes

Port Island has been designated as a Site of Special Scientific Interest since 1979 because of its ornithological interest.