双足步行

动物在陆地上的一种运动方式

双足步行[4]双足运动(英語:bipedalism)是动物在陆地上的一种运动方式英语terrestrial locomotion,动物通过移动两个后或后行进。能够进行这种运动的动物被称为双足动物,依照此原理制造的仿生机器人则会被称为双足机器人。双足运动通常包含步行跑步跳躍

现存最快的双足动物是鸵鸟[1],它们的奔跑速度可达70公里每小時(43英里每小時)[2][註 1]

现存动物中很少有主要依靠双足运动在陆地上移动的。哺乳动物的双足运动历经多次演化,目前能双足运动的哺乳动物有袋鼠科更格卢鼠英语Dipodomyinae, 跳兔[5]彈鼠穿山甲人族猿猴(南猿人类),此外还有几个现已灭绝的种类,这些动物各自独立演化出了双足运动的能力。三叠纪期间,有几个主龍類动物(有鳄鱼恐龙)也发展出了双足运动能力,其中双足恐龙在日常生活中已双足运动为主。现代的鸟类就是由完全凭靠双足移动的獸腳亞目演化而来。

有的现生动物会短时间切换为双足运动模式。有的蜥蜴在奔跑时会双足移动以躲避天敌。许多灵长类在探索四周、觅食时会双足站立,不过也有时候会双足步行一段距离。一些树栖灵长类物种(如长臂猿大狐猴)在下地时会改为完全双足运动。许多动物在打架或交配时会双足站立。有的动物在求偶、警戒、吓唬竞争者或捕食者时会双足站立,但不会靠双足四处移动。

参见

  1. ^ 紅大袋鼠可以以类似的速度短距离移动[3]

参考资料

  1. ^ Stewart, D. A Bird Like No Other. National Wildlife英语National Wildlife. National Wildlife Federation英语National Wildlife Federation. 2006-08-01 [2014-05-30]. (原始内容存档于2012-02-09). 
  2. ^ Davies, S.J.J.F. Birds I Tinamous and Ratites to Hoatzins. Hutchins, Michael (编). Grzimek's Animal Life Encyclopedia 8 2nd. Farmington Hills, MI: Gale Group: 99–101. 2003. ISBN 978-0-7876-5784-0. 
  3. ^ Penny, M. The Secret World of Kangaroos. Austin, TX: Raintree Steck-Vaughn. 2002: 22 [2021-09-26]. ISBN 978-0-7398-4986-6. (原始内容存档于2021-08-16). 
  4. ^ bipedalism - 雙足步行. 国家教育研究院. [2021-09-26]. (原始内容存档于2021-09-26). 
  5. ^ Heglund, NC; Cavagna, GA; Taylor, CR. Energetics and mechanics of terrestrial locomotion. III. Energy changes of the centre of mass as a function of speed and body size in birds and mammals. Journal of Experimental Biology. 1982, 97: 41–56. PMID 7086349. doi:10.1242/jeb.97.1.41. 

拓展阅读

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