A survey of birds in Jeju (Quelpart) Island

Abstract

1. The present survey consists of the records of birds sighted or collected in Jeju Island from December 1972 to December 1976; particularly, of the result of the bird censuses conducted in 3 winter seasons and 1 summer season.2. The number of birds hitherto sighted and recorded in Jeju Islands is 198 species and subspecies, and the number of birds either sighted or collected through the present survey is 77 species. Of these, the details noteworthy are as follows:1) One bird species of Japanese Green Pigeon, Sphenurus sieboldii sieboldii (Temminck), which was hitherto unrecorded has newly been added to the list of the Korean birds.2) Eight species of birds have newly been sighted in Jeju Island, which have subsequently been added to the list of birds of Jeju Island.3. During winter seasons, birds censuses were conducted three times in the area of Jeju City via Seongsanpo to Seogwipo that is the east side of Jeju Island and two times in the area from Seogwipo via Moseulpo back to Jeju City that is the west side of Jeju Island.The total number of the birds sighted during the winter seasons is 7, 289 individuals of 58 species. The number of individual birds and species in each area and year are as follows: (Cf. Table 6, Fig. 9.)The area of Jeju City via Seongsanpo to Seogwipo1) December 31, 1972…635 individuals of 25 species2) January 18, 1974…4, 38 individuals of 33 species3) December 3, 1976…508 individuals of 28 speciesThe area of Seogwipo via Moseulpo to Jeju City1) December 31, 1972…248 individuals of 16 species2) January 19, 1974…1, 178 individuals of 26 speciesThe area of Seogwipo via 5.16 Cross Road to Jeju City1) December 3, 1976…174 individuals of 7 speciesAs shown above, in the bird censuses conducted six times during the winter seasons, a total of 7, 289 individuals of 58 species were sighted. Species dominance shows Carrion Crow (32.14%) which is the most dominant, followed by Spotbill Duck (16.51%), Wigeon (7.11%), Meadow Bunting (6.05%) and so on. (Cf. Fig. 9.)4. In the summer season, only one bird census was conducted in the area of Jeju City via Mt. Hanra to 5.16 Cross Road on July 29, 1973. The number of birds sighted in this area is 274 individuals of 22 species. Species dominance shows Bush Warbler (23.35%), which is the most dominant, followed by Great Tit (18.97%), Blue Flycatcher (11.67%), Greenfinch (10.21%), Crowned Willow Warbler (8.75%) and so forth. (Cf. Fig. 10.)5. The sum total of the birds sighted or collected in winter and summer surveys conducted by the authors in Jeju Island from December 1972 to December 1976 is 7, 795 individuals of 77 species. The most dominant species among these is Carrion Crow (30.13%) followed by Spotbill Duck (17.12%), Wigeon (6.65%), Meadow Bunting (5.59%) and so on. (Cf. Fig. 11.)