2026年1月5日、ホシハジロとカルガモが水面で並んた写真を撮れた。体の特徴の違いが判る。ホシハジロの体はカルガモの体より深く水に沈んでいるので尾羽は水中の隠れている。カルガモの尾羽は水面より上に見える。同じ池に住んでいても互いに異なった餌を食べたり餌の取り方が違うので争うこともなく共存できるのでしょう。
On January 5, 2026, I was able to take a photo of a Common Pochard and a Spot-billed Duck side by side on the water surface. You can see the difference in their physical characteristics. The Common Pochard’s body is submerged deeper in the water than the Spot-billed Duck’s, so its tail feathers are hidden underwater. The Spot-billed Duck’s tail feathers are visible above the water’s surface. Even though they live in the same pond, they eat different foods and have different foraging methods, so they can coexist without fighting.
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