Ground nesting birds list in high ratio as endangered species of the Red Data Book. This main cause is regarded as the decrease of the bare lands suitable for nesting. The kinds of rooftop nesting birds increase while bare lands environment of nature like sandy beaches decreases. I searched papers about rooftop nesting, and compiled species and period that the habit had started from. As results, I discovered records of the rooftop nesting of 36 kinds of Charadriiformes birds. And the time when rooftop nesting species increased almost correspond to the period when buildings made of steel reinforced concrete increased. It will be considered that the active invitation of the roof-top nesting helps the protection of the endangered species nesting on the ground in future. On the other hand, maintenance of the appropriate outskirts environment is necessary if we do not hope roof-top nesting of large gulls that often give a bad influence to the life of the people.

Breeding philopatry and natal philopatry are important information for understanding their breeding ecology and population dynamics. We banded 19 parent birds and 220 nestlings of the Russet Sparrow Passer cinnamomeus in lowland open forest by Lake Ogawara in Misawa city, Aomori Prefecture during 2015–2018, then calculated the return rates based on their observation records up to 2019. Parent birds' return rate was 52.0% (n=13/25) and all returned birds bred. In fledglings, the 1st-year return rate was 5.9% (n=13/220), slightly lower than that of the other migratory passerines, and males tended to return more than females. Returning and nesting rate was the lowest at 0.5% (n=1/220) in 1st-year, and the highest at 2.5% (n=5/202) in 2nd-year. It seemed that one-year-old birds might be disadvantaged in competition for mate partners or nesting sites.

Components of wing-formula; the longest primary (s), the order of the p9, feather gaps on primaries and emarginations of outer webs of primaries were compared between the Eyebrowed Thrush (n=29), the Pale Thrush (n=39), the Brown Thrush(n=79) and the Izu Thrush (n=16). All the components were significantly different between four species, and species with longer migration had more pointed wings. Wing-formula was effective in the identification of the four species because the appearance of gaps on the primary was divided into two groups; Eyebrowed/Izu and Pale/Brown-headed, the gap of the Izu Thrush was composed different primaries from the others and emarginations might exist more proximal, and emarginations of the Eyebrowed Thrush existed more distal.

On September 16, 2018, a single Sedge Warbler Acrocephalus schoenobaenus was captured at Yonago Waterbird Sanctuary in Hikonashinden, Yonago City, Tottori Prefecture, Japan. After carrying out banding and taking measurements and photographs, the individual was categorized as a sex-unknown/juvenile. It is the third national record and the second ringing record of this species in Japan.

The wintering areas of the Siberian Rubythroat, Luscinia calliope, are the Amami Islands and the Ryukyu Islands according to the Seventh Revised Edition of the Check-list of Japanese Birds, but we captured three Siberian Rubythroats in winter on the riverbeds of the Sagami and Nakatsu rivers in Kanagawa Prefecture. We obtained their capture records from the autumn migration (including winter) to the spring migration in Japan from 1973 to 2015 with the permission of the Bird Migration Research Center of the Yamashina Institute for Ornithology and examined their migration and wintering situations in Kanagawa Prefecture and Japan. These records indicate that the presumed regular wintering areas of the Siberian Rubythroat are not only the previously identified Ryukyu Islands and Amami Islands but also the Tokara Islands and the mainland of Kagoshima Prefecture, which are located north of the Amami Islands. In Kanagawa Prefecture, the number of birds captured was small and included migratory birds. The proportion of overwintering birds was high. These results suggest that a small number of birds may be overwintering or rarely overwinter. In addition, there were few records in Shizuoka, Nagano, and Hyogo prefectures during the presumed wintering season. More banding surveys during the wintering period will provide more wintering records in relatively warm areas with little snow cover.

During the 42 years from 1975 to 2018 (except for 1996 and 1997), 8,054 Great Cormorants (Phalacrocorax carbo) were banded in six colonies in Southern Kanto. By June 2019, 430 banded individuals had been recovered, including 50 that were confirmed dead in the natal colony. The number of "removals" (shot and killed) was four individuals banded in the first period (1975–1995) compared to 81, most of which were between 0 and 1 year old, banded in the second period (1998–2018). There were no "caught in net" recoveries in the first period; in the second period, 25 individuals were mostly under a year old. The average number of survival days of the recovered, "removed" birds in the second period was longer than those with other causes of death, as many other individuals died under a year old. In addition, the average distance between the natal colony and the recovery locations was longer in the second period than in the first period when compared (excluding recovered individuals in the natal colony). This is because a greater number of colonies and roosts were established around Southern Kanto, a larger area, in the second half of this period. These recovery records indicate a significant influence of habitat status in the study area and appreciable age differences in cormorants in certain cases of recovery.