The results of a field survey on biodiversity that was conducted last year on Kaisha Island in Tongzhou district, Nantong, East China's Jiangsu province, were recently released.

The common kestrel, one of the species under national second-class protection, is spotted on Kaisha Island in Tongzhou district, Nantong, East China's Jiangsu province. [Photo/WeChat account: southtongzhou]

According to the survey, researchers spotted 43 species of birds on Kaisha Island, including tundra swan and common kestrel, which are under national second-class protection, last year.

Tundra swans are spotted in winter in Tongzhou district. [Photo/WeChat account: southtongzhou]

The appearance of various bird species in Tongzhou was made possible by the improvement of the ecological environment in the district.

Long-tailed shrike in Tongzhou district. [Photo/WeChat account: southtongzhou]

Tongzhou is now looking to continue the field survey on biodiversity to further determine the distribution, population, and living conditions of rare and endangered species in the district.