ムジセッカ, Phylloscopus fuscatus

• 和名: ムジセッカ, English: Dusky warbler, Binomial name: Phylloscopus fuscatus (Blyth, 1842)
• スズメ目 > メボソムシクイ科 > メボソムシクイ属 > ムジセッカ
• Order: Passeriformes > Family: Phylloscopidae > Genus: Phylloscopus > Species: P. fuscatus

東アジアで繁殖し南アジアや東南アジアに渡り越冬するメボソムシクイ属のムジセッカ
Dusky warbler, an Old-World warbler which breeds in east Asia, is strongly migratory and winters in South Asia and South-east Asia

2019年2月8日、の寒い日だったが晴れたので秋ヶ瀬公園に行った。遊歩道を歩いていると横の藪に小さい野鳥が 飛んできた。小鳥は藪の中をせわしなく動き回った。かろうじて2，3枚姿の分かる写真を撮れた。
On sunny but cold day of February 8, 2017, I visited Primrose Park and adjacent Sai Lake in Saitama prefecture. When walking along the promenade of Sai Lake, a small bird flew in the side bushes. The small bird moved restlessly in a thicket. I barely took a couple of photos.

(Saitama, Japan, 09:43, 09:44, Feb. 08, 2019, D850, 300mm f/4E PF+TC-14E III)

この小鳥はウグイスだろうと思ってFacebookに投稿したらムジセッカと指摘された。ムジセッカは東アジアで繁殖し南アジアや東南アジアに渡り 越冬するメボソムシクイ属の旧大陸鳴鳥だ。日本野鳥の会の記述: 主に日本海側の地域で、渡りの季節に少数が見られる。
I thought that this little bird would be Japanese bush warbler and posted it to Facebook, but I was pointed out that the bird is Dusky warbler. Dusky warbler is an Old World warbler, which breeds in east Asia, is strongly migratory and winters in South Asia and South-east Asia. Description of the Wild Bird Society of Japan: A small number is seen mainly in the are on the side of the Sea of Japan in the season of migration.

( Saitama, Japan, 09:44, Feb. 08, 2019, D850, 300mm f/4E PF+TC-14E III)

Wikipedia: （旧世界）ムシクイ類はかつてはウグイス科 Sylviidae などとして分類され400種前後が属したが、多系統であり、多くの科に分割された。
Old World warblers are a large group of birds formerly grouped together in the bird family Sylviidae. The family held over 400 species in over 70 genera, and were the source of much taxonomic confusion. ... In the past ten years they have been the subject of much research and many species are now placed into other families, including the Acrocephalidae, Cettiidae, Phylloscopidae, and Megaluridae. ...