It’s a good question, 因為我可以回答，見內頁。

抄一段：

“These regal birds aren’t really bald, but their white-feathered heads gleam in contrast to their chocolate-brown body and wings.”

推薦閱讀鳥網站的詳細資料：

https://www.allaboutbirds.org/guide/Bald_Eagle/overview