I studied the individual discrimination using color rings and the follow-up survey to Gray-headed Lapwing Vanellus cinereus which breeds in Nasunogahara area in Tochigi Prefecture, And It reported in this paper since information was acquired about the relationship of pair over more than one year, the sex difference of the nest site fidelity which continued using the same nest site and the example of divorce and remating.

It was confirmed that Gray-headed Lapwing is a species of strong the nest site fidelity which continues using the same nest site. And the tendency was strongly looked at by the male rather than the female. The years which continued and used the same nest site had a significant difference(P = 0.0026) by the female and the male. The male is an average of 6.1 years and the female is an average of 2.4 years.

Although the relationship of pair was monogamy during a breeding season. And the relationship was continued over more than one year. However, there was little what continues the relationship over a long period of time, and the female was replaced in several years. Continuation of the relationship was for a maximum of 5 years. Moreover, pair also had the example which was divorced and was remarried to individual with another each.

This paper reports the number of feathers: 308 species of Japanese birds and 201 species of foreign (out of Japan) birds. The number of tail feathers was counted from living birds, specimen and obtained dead bodies.

This report is a report of a Daurian Redstart Phoenicurus auroreus returned a place of birth and breed on same place in Japan. On May 23, 2017, this breeding bird and a nest were discovered in Hokuto City, Yamanashi Prefecture. The female parent of this nest has a ring for tagging by the Ministry of the Environment of Japan. We read tag number of the ring by taking photograph. The individual, which was a nestling, was ringed and released in a nest in 2016 and the place of the nest at a point about 220 m away from the breeding site. Daurian Redstart is a common winter bird in Japan, but in recent years there have been some reports from all over Japan and it is suggesting that the breeding distribution will expand. However, there is few information of basic ecology of Japanese breeding individuals of this species such as wintering grounds, migration routes, and distribution of young birds. This report will be support for estimating future population dynamics as a reliable record of the breeding of Daurian Redstart, which was born in Japan.