Gray whales off America migrate 16,000 kilometers between productive feeding areas and less productive calving, or birthing, areas and back every year. As they do so, they transport fertilizer in the form of their feces from places that have it to places that need it.
アメリカ沖のコククジラは 豊かな餌場と餌の少ない出産、育児場所の間― １万６千キロを回遊し 毎年戻ってきます １万６千キロを回遊し 毎年戻ってきます