The measurements of a bird are usually taken by the length of wing, tail, tarsus and culmen. The authors measured these parts of over 400 individuals of the adult Japanese Tree-Sparrow, Passer montanus saturatus Stejneger, collected in the yard of Wildlife Experiment Office, Ministry of Agriculture and Forestry, Renkoji, Minami-tama Gun, Tokyo. The collection was carried out by the use of bird-net for the period January 5 to December 21, 1965. This paper dealt with the result of study on individual variation of this kind of sparrows. The wing length ranged from 61.0 to 73.0 mm with an average of 67.66±0.25 mm. The figure representing the frequency distribution of this measurement value showed nearly normal distribution curve. The tail length ranged from 50.0 to 59.0 mm, tarsus from 15.0 to 19.0 mm, and culmen from 9.0 to 12.0 mm, respectively. The body weight ranged from 18.0 to 27.5g.
The correlation coefficients of the length of tail, tarsus, culmen, and body weight against wing length were also calculated. As the result of these calculations, the length of tail was found to be highly correlated with that of wing but other three parts are not so. Each of the frequency distribution curves of these characters made a continuous and mountain-shaped one, when both sexes were combined. But, when being treated statistically after sexing ten individuals (6 _??_ _??_, 4 _??_ _??_) by means of recognition of gonads, all measurement values showed a trend to be larger in males than in females.

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Body weights in E. r. latifascia and A. a. orientalis increase in premigration periods. Body weights in E. r. latifascia and P. m. saturatus also increase in winter. Body weight and lipid in L. fasciolata do not differ significantly in both periods of spring and autumnal migration.
Liver weights in A. a. orientalis and E. r. latifascia increase in premigration period. Thus the high metabolism of lipid in liver appears in premigration period.
Melting point of lipids in A. a. orientalis and E. r. latifascia decrease in premigration periods which suggests the increase of unsaturated fatty acids in lipid. Iodine values in A. a. orientalis and E. r. latifascia increase in molting period and slightly decrease in premigration period. Saponification values in A. a. orientalis and E. r. latifascia gradually increase in premigration period. Saponification values in E. r. latifascia and P. m. saturatus increase in winter. The value of subcutaneous lipid in E. r. latifascia is higher than that of the body lipid, while in P. m. saturatus does not differ significantly.
Fatty acid composition of lipid in several passerine birds mainly consist of oleic acid and palmitic acid. Fatty acid composition in E. r. latifascia tends to increase in unsaturated fatty acid from midwinter to premigration period.
Food intake in caged E. r. latifascia increases in winter and becomes more intense in spring, while it increases in winter and breeding season in P. m. saturatus.
Zugunruhe in E. r. latifascia appears in late April and early May and lasts approximately one and a half month or slightly longer. The duration of Zugunruhe may not be fixed in the species, but may be changeable to the physiological and ecological conditions.
A working hypothesis can be proposed for the spring migration.

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The third article includes known localities of the distribution of seven species of the fresh-water ducks, such as Baikal Teal, Falcated Teal, Wigeon, American Wigeon, Pintail, Garganey, and Shoveler, as well as the Mandarin Duck.

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The fourth and final part indicates known localities of fourteen species of the salt-water or diving ducks and three species of Mergansers or Sawbills. Very interesting addition is Netta rufina which was observed in the Fukui Prefecture, Japan.

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A new record of Erithaus sibilaus from Sado Is. On 18 May 1969, a female bird of this species was obtained by the author on the police office in Riyoutsu City Niigata Prefecture. By Akira Matsunaga observed Fregata ariel at Yonuyama big bridge neighbourhood in Kashiwazaki, Niigata Prefecture.

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The present article contains new American names proposed by Mrs. de Schauensee and Eisenmann in 1966, with the Japanese names appeared in Kuroda's Psittacidae of the World (1967) for comparison.

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