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'''''Progression of Animals''''' (or '''''On the Gait of Animals'''''; {{langx|el|Περὶ πορείας ζῴων}}; {{langx|la|De incessu animalium}}) is one of [[Aristotle]]'s major [[Aristotle's biology|texts on biology]]. It gives details of [[gait]] and movement in various kinds of animals, as well as speculating over the structural homologies among living things.<ref name="BH">Hall, Brian, Fins into Limbs: Evolution, Development, and Transformation, University of Chicago Press (2007), p. 1</ref>

Aristotle sets out to "discuss the parts which are useful to animals for their movement from place to place, and consider why each part is of the nature which it is, and why they possess them, and further the differences in the various parts of one and the same animal and in those of animals of different species compared with one another" (704a1-4). ''Progression of Animals'' illustrates Aristotle's teleological approach to animal biology.{{Citation needed|date=January 2024}}

==Texts and translations==
* {{Wikisource-inline|On the Progression of Animals}}
* Greek text and English translation by E.S. Forster ([[Loeb Classical Library]], ''Aristotle Parts of Animals, Movement of Animals, Progression of Animals,''  1937): [https://archive.org/details/partsofanimals00aris archive.org]
* ''On the Gait of Animals'', translated by [[A. S. L. Farquharson]], Oxford, 1912: [https://books.google.com/books?id=u7_WAAAAMAAJ&dq=farquharson%20aristotle&pg=PR4-IA125 Google Books],[https://web.archive.org/web/20060307233012/http://etext.library.adelaide.edu.au/a/aristotle/gait/ Adelaide (HTML)], [http://classics.mit.edu/Aristotle/gait_anim.html MIT Classics (HTML)]
* {{librivox book | title=Movement & Progression of Animals | author=ARISTOTLE}}
* [http://www.kennydominican.joyeurs.com/GreekClassics/AristotleIncessuAn.htm Greek text with Farquharson's translation facing]
* [http://remacle.org/bloodwolf/philosophes/Aristote/marche.htm Greek text with French translation and commentary] by [[Jules Barthélemy-Saint-Hilaire]]

==References==
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{{Aristotelianism|collapsed=y}}
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[[Category:Works by Aristotle]]
[[Category:Zoology books]]


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