As a result of conducting the study on the current state of bird diversity living in specific islands (Gokdudo, Daehangdo and Mokdo) twice for two days each on June and September, 2012, total 30 species, 184 birds were observed. As for each island, 8 species, 79 birds were observed in Is. Gokdudo, 17 species and 46 birds in Is. Daehangdo, and 20 species and 59 birds in Is. Mokdo. The most dominant species was Apuspacificus in the whole areas, total 58 birds (31.5%) were observed. In analysis of ecological index, species diversity was 2.62, species evenness was 0.77 and species richness was 5.56, and as for protected species, 3 species of natural monuments, two species of endangered wildlife class II and one kind of vulnerable species of the International Union for Conservation of Nature were recorded.