為猶他春遊買的玩具，先在俺們村試驗，周末去拍鳥，剛知道俺們村的一片荒廢的玉米地是沙丘鶴的遷徙的驛站。到了那，鳥比人多多了，幾百隻，被幾個人圍觀。和周邊的人的玩具一比，俺的是小米加步槍的檔次，下一個玩具目標出來了，700 mm 的炮筒。雖然步槍，還是放了幾槍，對付著看。查 wiki，這沙丘鶴挺有來頭，算得上活化石，和丹頂鶴很像，隻是羽毛是淺灰色的。
Fossil record
Sandhill cranes have one of the longest fossil histories of any extant bird.[17] A 10-million-year-old crane fossil from Nebraska is said to be of this species,[18] but this may be from a prehistoric relative or ancestor of sandhill cranes, and not belong in the genus Grus. The oldest unequivocal sandhill crane fossil is 2.5 million years old,[19] older by half than the earliest remains of most living species of birds, primarily found from after the Pliocene/Pleistocene boundary some 1.8 million years ago. As these ancient sandhill cranes varied as much in size as present-day birds, those Pliocene fossils are sometimes described as new species.[20] Grus haydeni may have been a prehistoric relative, or it may comprise material of a sandhill crane and its ancestor.[21][22]
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