The present paper deals with the breeding ecology of the Long-tailed Rosefinch(Uragussibiricus ussuriensis)at the Mt.Changbaishan in the spring and winter of 1984 and 1985 andalso in the winter of 1986.The Long-tailed Rosefinch is a resident species inhabiting mash-land shrubs.It feeds on vegetable matter and only in the breeding period it takes some in-sects. In the breeding period there are 1.3 couples per square hectare in suitable habitats,but there are only 0.074 of the Long-tailed Rosefinch found in th...