Tripedalism (from the Latin tri = three + ped = foot) is locomotion by the use of three limbs. It has been said that parrots (Psittaciformes) display tripedalism during climbing gaits, which was tested and proven in a 2022 paper on the subject, making parrots the only creatures to truly use tripedal forms of locomotion. Tripedal gaits were also observed by K. Hunt in primates. This is usually observed when the animal is using one limb to grasp a carried object and is thus a non-standard gait. Apart from climbing in parrots, there are no known animal behaviours where the same three extremities are routinely used to contact environmental supports, although the movement of some macropods such as kangaroos, which can alternate between resting their weight on their muscular tails and their two
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| - 三足歩行 (ja)
- Tripedalism (en)
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| - 三足歩行（さんそくほこう、英語: Tripedalism、ラテン語: tri = 3 + ped = 足）は、3本の脚を使用する歩行様式。オウムは、登山歩行中に三足歩行運動を示すと推測されているが、まだ科学文献で完全に文書化されていない。霊長類では、人類学者のKevin D. Hunt によって三足歩行が観察されている。動物が片方の手足で持ち物を掴んでいる時に行われる標準外の歩行である。オウム以外では、3本の足が標準的な既知の種は存在しないが、筋肉がある尾と2本の後ろ足に体重をかけることを交互に行うことができるカンガルーなどのいくつかのカンガルー科の動きは、三足歩行の例である。魚類では、三チョウチンハダカ科など三本足と言える魚もいる。これらの魚のいくつかの種は、2つの長い骨盤ひれと1つの尾びれを支えとして海底に横たわる。 三足歩行は、二足歩行動物の一般的な二足歩行および四足歩行動物の四足歩行とは対照的である。 (ja)
- Tripedalism (from the Latin tri = three + ped = foot) is locomotion by the use of three limbs. It has been said that parrots (Psittaciformes) display tripedalism during climbing gaits, which was tested and proven in a 2022 paper on the subject, making parrots the only creatures to truly use tripedal forms of locomotion. Tripedal gaits were also observed by K. Hunt in primates. This is usually observed when the animal is using one limb to grasp a carried object and is thus a non-standard gait. Apart from climbing in parrots, there are no known animal behaviours where the same three extremities are routinely used to contact environmental supports, although the movement of some macropods such as kangaroos, which can alternate between resting their weight on their muscular tails and their two (en)
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| - Tripedalism (from the Latin tri = three + ped = foot) is locomotion by the use of three limbs. It has been said that parrots (Psittaciformes) display tripedalism during climbing gaits, which was tested and proven in a 2022 paper on the subject, making parrots the only creatures to truly use tripedal forms of locomotion. Tripedal gaits were also observed by K. Hunt in primates. This is usually observed when the animal is using one limb to grasp a carried object and is thus a non-standard gait. Apart from climbing in parrots, there are no known animal behaviours where the same three extremities are routinely used to contact environmental supports, although the movement of some macropods such as kangaroos, which can alternate between resting their weight on their muscular tails and their two hind legs and hop on all three, may be an example of tripedal locomotion in animals. There are also the tripod fish. Several species of these fish rest on the ocean bottom on two rays from their two pelvic fins and one ray from their caudal fin. Real-world tripedalism is rare, in contrast to the common bipedalism of two-legged animals and quadrupedalism of four-legged animals. The code for bilateral symmetry seems to have become entrenched very early in evolution, appearing even before appendages like legs, fins or flippers had evolved; with that template came a built-in bias toward even-numbered limb configurations. (en)
- 三足歩行（さんそくほこう、英語: Tripedalism、ラテン語: tri = 3 + ped = 足）は、3本の脚を使用する歩行様式。オウムは、登山歩行中に三足歩行運動を示すと推測されているが、まだ科学文献で完全に文書化されていない。霊長類では、人類学者のKevin D. Hunt によって三足歩行が観察されている。動物が片方の手足で持ち物を掴んでいる時に行われる標準外の歩行である。オウム以外では、3本の足が標準的な既知の種は存在しないが、筋肉がある尾と2本の後ろ足に体重をかけることを交互に行うことができるカンガルーなどのいくつかのカンガルー科の動きは、三足歩行の例である。魚類では、三チョウチンハダカ科など三本足と言える魚もいる。これらの魚のいくつかの種は、2つの長い骨盤ひれと1つの尾びれを支えとして海底に横たわる。 三足歩行は、二足歩行動物の一般的な二足歩行および四足歩行動物の四足歩行とは対照的である。 (ja)
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