whooping cranes and sandhill

来源：学生作业帮编辑：作业帮分类：生物作业时间：2024/04/29 11:45:56

高鸣鹤 whooping crane
鹤科鸟类,学名Grus americana,即美洲鹤.最高的美洲鸟,也是世界稀禽之一,正式列为濒危种.体高约150厘米,翅展约210厘米.体羽白色,翅尖黑色,腿黑色,裸露的面部和头顶红色.其高声鸣叫在3千米外都能听到.据信,若干时间以来高鸣鹤之类鸟类的数量之所以下降,主要原因是生态条件的改变,人类的捕猎及垦荒只是部分原因.20世纪末全世界高鸣鹤的数量还不到300只.
沙丘鹤 sandhill crane
鹤形目鹤科的涉禽.身长90～110公分(35～43吋),顶部红色,身体呈蓝灰色或灰褐色并略带浅黄色.叫声长而刺耳.鹤类属于最古老的鸟类,繁殖地从阿拉斯加到哈得逊湾；最初这种鸟繁殖于加拿大中南部和美国五大湖区,但现在在那里已不多见.沙丘鹤中体形较小,不迁徙的一个亚种在佛罗里达和乔治亚南部繁殖后代.人们使用沙丘鹤代为抚养幼小高鸣鹤以防止其灭绝.

SAT语法题Captive-bred whooping cranes have no parents to teach Some workers drive bulldozers and work cranes.翻译,thx 单项选择1.The number of the cranes is getting ___. A.fewer and f There are many fish in __ __of the river,and cranes can catc Zhalong Nature Reserve is a wonderful home for cranes and __ 初二英语首字母填空We are beautiful red-crowned cranes I have some paper cranes.改一般疑问句, He likes cranes better than any other bird.同义句 I like all kinds of birds,______ the rare red-crowned cranes 英语翻译Equipmentfor cargoTwo (2) heavy lift cranes (SWL 900 t e 适当形式填空：You can't find many cranes here,because they live in 英语翻译One jig was used for assembling two service cranes.At fi