タカ目の種は初列風切を最内側のP1から最外側のP10へと順番に換羽する標準的な換羽様式を行うと言われていた．しかし，近年タカ目であるツミAccipiter gularisにおいて初列風切の中央を最初に換羽する新たな換羽様式を行うものがいると報告された．しかし，その換羽様式は全容解明には至っておらず，更なる調査が必要である．そこで，著者らはツミの若鳥の換羽様式を調査し，本報ではその順序，時期および雌雄差について報告する．調査は，写真（146例），剥製（56例），飼育された鳥（1例）の3つの材料を用いて翼の換羽データを収集した．そこから換羽の順序を見積もるために2つの異なる方法を用いて解析した．1つは換羽した部位の分布から推定する方法であり，もう1つは非対称の換羽の位置から推定する方法である．換羽における性別，時期別，地理別の違いの有無を調べるために統計解析を行った．これらの解析により，ツミの独特な換羽様式が得られた．いくらかの個体は初列風切の中央から換羽を始め，内側と外側の両側に向かって順番に換羽する散開式換羽を行い，そしてそれは越冬期に行われた．加えて，散開式換羽を行うものは雌より雄の方が換羽が早く行われた．さらに，次列風切ではS2がS1より先に換羽した．このような一般的ではない換羽様式とそれに関連する現象（渡りや換羽時期）の解明は換羽の進化をより深く理解する一助となる可能性があり，更なる調査が必要である．

1976～2020年に北海道の1,074区画（4.5 km×5.0 km）内の1,219調査路（2 km）と165定点でエゾライチョウTetrastes bonasiaの調査を行った．さらに，既存の論文・報告書，探鳥会などの記録を含め，2,041区画についてエゾライチョウの在・不在記録を得，分布図を作成した．エゾライチョウは山間部では1,291区画中758区画（58.7％）,平野・盆地部では750区画中109区画（14.5％）で観察された．分布図作成で在・不在記録を用いたことで，山間部と平野・盆地部における分布の違いを数量的に，より明瞭に示すことができ，また従前の分布図の空白の区画の一部にもエゾライチョウが分布することを明らかにできた．

On August 2017, I observed a Northern Goshawk (Accipiter gentilis) wearing an anklet at Mizumoto Park, Tokyo. Thereafter, I observed such a goshawk eleven times until early April 2018. In all records, the observed individual was a juvenile. Characteristics of plumage and the presence of an anklet suggested that all eleven observation records were derived from one or a few individuals, which had escaped from captivity. If the last observed individual was the same as the first one, it had survived for at least 110 days. Currently, by law most goshawks held in captivity cannot be a subspecies breeding in Japan. If exotic subspecies escaping from captivity bred with Japanese subspecies, native subspecies will be at risk of genetic disturbance due to hybridization.

We monitored the breeding performance of Black-tailed Gulls Larus crassirostris on Kabushima Island, which has been connected to Honshu Island by a manmade isthmus since the 1940’s, from 2012 to 2020. The mean number of eggs per nest on 13–20 May between 2014 and 2020 (2.01‒2.16 egg/nest), except for 2019, was higher than that in 2012, 2013, and 2019 (1.57‒1.80 egg/nest). However, the number of chicks on 5–15 July per number of eggs on 13–20 May in 2014 and 2020 (0.01‒0.17 chick/egg) was lower than that in 2012 and 2013 (0.23‒0.29 chick/egg).

Monitoring Avian Productivity and Survivorship (MAPS) is a method developed in North America to monitor local avian fauna by constant-effort mist netting and banding during breeding seasons across years. Following the protocol of MAPS, we have been studying avian fauna in Fukushima, Japan since 2012. Here, we report the results obtained from 2018 to 2020. Also, results including adult abundance index, productivity index, and apparent adult survival rate from the entire study period (2012–2020) were analyzed. Adult abundance of the Japanese Bush Warbler Cettia diphone at a study site in Minami-Soma City were relatively stable. At a study site in Iitate Village however, adult abundance of this species fluctuated greatly. Adult abundance of the Oriental Reed Warbler Acrocephalus orientalis in Minami-Soma has been increasing steadily during the study years while that of the Oriental Greenfinch Chloris sinica has increased in the later years (2018–2020). Adult survival of the Oriental Reed Warbler from 2012–2013 to 2018–2019 in Minami-Soma was 0.15–0.40 (mean=0.26).