和名:オオハヤブサ, English: Peale’s falcon, Trinomial name: Falco peregrinus pealei (Ridgway, 1873)
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ハヤブサ目 > ハヤブサ科 > ハヤブサ属 > ハヤブサ種 > オオハヤブサ亜種
Order: Falconiformes > Family: Falconidae > Genus: Falco > Species: F. peregrinus > Subspecies: F. p. pealei
秋ヶ瀬公園のオオハヤブサ, Peale’s falcon in Akigase Park
秋ヶ瀬公園の野鳥園で25人位の方がヒレンジャク飛来を待っていた。突然、何人かが大空に望遠レンズを向けた。 一羽の猛禽が大空高く飛んでいた。肉眼では分かり難かったが写真を拡大してみるとノスリだ。突然、もう一羽の猛禽が現れてノスリに近づいた。
About 25 people were waiting for the arrival of Japanese waxwing in the wild-bird garden of Akigase Park. Suddenly, some people turned the telephoto lens into the sky. A bird of prey was flying high above the sky. It was hard to see with the naked eye, but when I tried to enlarge the picture it was the Eastern buzzard. Suddenly another bird of prey appeared and approached the Eastern buzzard.
突然、もう一羽の猛禽が現れてノスリに近づいた。この猛禽の大きさはノスリとほぼ同じ位で体形はハヤブサだ。 2羽の猛禽はテリトリー争い始めたようだが、明らかにハヤブサが優位に見える。
Suddenly another bird of prey appeared and approached the Eastern buzzard. The size of this bird of prey is about the same as that of the buzzard and the figure looks falcon. Two birds of prey seemed to begin fighting territory but obviously the falcon looked superior.
ハヤブサはまたノスリに接近した。明らかにノスリはたじろいでいる。このハヤブサはノスリと同じ位大きく、 その羽衣はノスリに比べはるかに黒っぽく見える。このことから、このハヤブサは亜種のオオハヤブサと思われる。
The falcon approached the buzzard again. Obviously the buzzard was afraid of the falcon. This falcon is as big as the buzzard and its appearance looks much darker than the buzzard. From this fact, it seems that this falcon is a subspecies Peale’s falcon (Falco peregrinus pealei).
2羽の猛禽は最接近の後、お互い反対方向に飛び去った。オオハヤブサがこの公園付近に来ていることは前回（2018/2/9）聞いたので、 その個体と思われる。オオハヤブサはアラスカとアリューシャン列島に沿ってロシアのベーリング海海岸などで見られ渡りを行わないので、 日本で見られるのは珍しいのだろう。偶然だが、貴重なシーンを見ることができた。
Two birds of prey flew away in opposite directions after the closest approach. As I heard that a Peale’s falcon is staying around this park last time (Feb. 9, 2018), it seems that this falcon is that individual. Peale’s falcon is found along the Gulf of Alaska and the Aleutian Islands to the far eastern Bering Sea coast of Russia and is non-migratory, and then it may be rare to see the Peale’s falcon in Japan. Coincidentally, I was able to see the precious scene.
(Akigase Park, Saitama, Japan, 10:38, Feb. 14, 2018, D810)
Falco peregrinus pealei, described by Ridgway in 1873, is also known as Peale’s falcon, and includes rudolfi. It is found in the Pacific Northwest of North America, northwards from the Puget Sound along the British Columbia coast (including the Queen Charlotte Islands), along the Gulf of Alaska and the Aleutian Islands to the far eastern Bering Sea coast of Russia, and may also occur on the Kuril Islands and the coasts of Kamchatka. It is non-migratory. It is the largest subspecies, and it looks like an oversized and darker tundrius or like a strongly barred and large anatum. The bill is very wide. Juveniles occasionally have pale crowns. Males weigh 700 to 1,000 g, while females weigh 1,000 to 1,500 g.
上記の翻訳: オオハヤブサを見られる場所は、北米の北西太平洋岸、ブリティッシュコロンビア海岸に沿ったPuget Soundから北方、 アラスカとアリューシャン列島に沿ってロシアのベーリング海海岸まで、またキリル諸島やカムチャツカの海岸の可能性もあります。 オオハヤブサは渡りをしません。オオハヤブサはハヤブサ種の中で最大の亜種です。それはツンドラハヤブサを一回り大きく 黒っぽくしたように見えます。クチバシはとても広い。幼鳥は時として薄い頭部を持ちます。オスは0.7-1.0kg、メスは1.0-1.5kgあります。
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