１月前の山形からカラフトムジセッカ。これまで何個体か鳴き声と姿は確認していましたが今回ようやく写真が撮れました。今回は合計で3個体を確認しました。 なお全部MFで撮った写真での更新ですが、一番近かったときはAFで撮ったのですがピントがうぃーんうぃーんでダメでした。 これまでも良い種であったり良い場面であったり(最近だとチゴモズのディスプレイだったりコサメの闘争だったり)をAFいったりきたりで撮り逃してきたのでポーンとCanon EF300mm F4L IS USM 買っちゃいました。テレコンはお金なくて未だ買えていません。
Object species of this article is Radde's warbler. I saw this species last month in Yamagata north-west of Japan. I saw&heard 3 individual and took photo 1 individual. When the time a Radde's approach me, I was not able to take photo, because the camera cannnot focus. I know that 7D and Sigma APO 150-500 are not suit and I experienced similar situation like Radde's one. So this time, I buy a new lens, Canon EF300mm F4L IS USM !!
Very cute face. Some bustle moving. Radde's warbler breed in Sakhalin to N Mongol. Little number of them that migrate are seen in Japan in migrate season. Many Japanese afraid that "Is it too difficult for me to separate Radde's to Dusly?" But it is easy to do this. I think Arctic(P.b.borealis) and Salhalin leaf is more similar to Radde's. Above 3 species have thick bill, the jizz is similar. The key of identification is body color, supeciilium, jizz and mooving.
Adult Radde's has complete molt in post-breeding season, and partial molt in pre-breeding involving some or all tails. Juv Radde's has partial molt in post and pre-breeding season. I know such things but ageing in reef or bush warbler is so difficult. This individual, wing and tail are fresh. However some yellowish-brown white tone in chin. Yellowish tone in thin is Juv feature but Ad complete body fether molt so we have to consider the yellowish tone is more strong than winter period. Considering that, may be such yellowish tone is seen in Ad naturally. Finally, I cannot judge the age. If someone can judge the age, please teach me.
Many people notice the existence of Radde's by characteristic song. Radde's song is more stinging than Duskey. The soft call "pof pof" is also characteristic. Song heard in morning and evening like other song birds. They song on the bush under no person situation, but they feel the existence of person, they escape and fly to bush. The moving is seen in Dusky, too. When I took the photo, the song stopped and he escape to bush. I feel sorry... There are the trend I think that Radde's moving more dense part of bush and Dusly moving more sparse part of bush. In breeding ground, they live in coniferous forest, edge of forest, marsh grassland and coppice. And in myanmar, Dusky and Radde's mix-species flocks are observed.