石垣島で数を増やしつつあるカタグロトビ
日帰り出張で石垣島に行ったついでに、今話題のカタグロトビを久しぶりに見てきました。
カタグロトビは、先月は4羽のヒナが巣立ち、同年3月には1羽のヒナが巣立ち石垣島で数を増やしつつあります。人間が持ち込んだわけでもなく、おそらく台湾あたりに生息する個体群からの自然飛来と思われます。
旺盛な繁殖力で今後も数を増やす可能性もありますが、しばらくはモニタリングなどして静かに見守るしかないでしょう。
An adult Black-shouldered Kite came flying toward me. It was good that it flew exactly the course I was hoping for, but after this shot I lost track of it. With my flight time pressing, I gave up the search.
It had been perched in a she-oak at first, but at some point without my noticing it had moved to a Garcinia tree.
True to its name, the Black-shouldered Kite has black shoulders. What is actually black is probably the lesser coverts, median coverts, and part of the greater coverts. The outer tail feathers are whitish, except for the central ones.
Viewed from below, you can see that part of the primaries and secondaries on the underwing are also black.
And those vivid red eyes are striking.
The tips of the primaries are coming in fresh.
Brown Shrikes were also moving through in good numbers.
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