燕鸥
4.The most important birds are Common tern(1 367 one/hm 2),Chinese pond heron (0 484 one/hm 2) and Rufous backed shrike(0 338 one/hm 2),Chinese pond heron,Common tern,Black drongo and others (22 species) are euryoecious, PIE is 0 838.
5.Arctic terns found in North America and the Arctic migrate each year as far south as Antarctica and back, a round trip of over 18,000 miles.
6.Any of several terns of the genera Anous and Micranous, found in tropical waters and having a dark brown or black color with a white or gray head.

