Biology:Grass-in-ear behavior
The grass-in-ear behavior, object-in-ear behavior[1] or grass-in-the-ear technique[2] is a fashion statement-like behavior that some chimpanzees do. The unusual behavior has been named by scientists, and it appears to be one of the first times that chimpanzees have created a tradition that has no discernible purpose.[3]
History
It was first documented in 2010 in the Zambian Chimfunshi Wildlife Orphanage sanctuary's grassy territory when a chimpanzee named Julie stuck a piece of grass into her ear, and left it there.[4][5] But after Julie did it, other chimpanzees in her group began to follow suit, beginning with her son.[6][7] The behavior continued to spread even after Julie died, which shows that the behaviour was established as a form of social learning in animals, an important component of animal culture.
References
- ↑ "Julie the inventor performing the grass-in-ear behaviour". https://www.researchgate.net/figure/Julie-the-inventor-performing-the-grass-in-ear-behaviour_fig1_263014686.
- ↑ ""Grass-in-the-ear" technique sets new trend in chimp etiquette" (in en). https://www.springer.com/gp/about-springer/media/research-news/-grass-in-the-ear-technique-sets-new-trend-in-chimp-etiquette/28948.
- ↑ "For The First Time, Chimpanzees Are Making A Fashion Statement – Sticking Blades Of Grass In Their Ears" (in en). 26 June 2014. https://www.thedodo.com/for-the-first-time-chimpanzees-605888880.html.
- ↑ Inquiry, The New (30 June 2014). ""grass-in-ear behavior"" (in en-US). https://thenewinquiry.com/grass-in-ear-behavior/.
- ↑ whyevolutionistrue (3 July 2014). "Chimps learn to stick grass in their ears—for no good reason" (in en-US). https://whyevolutionistrue.com/2014/07/03/chimps-learn-to-stick-grass-in-their-ears-for-no-good-reason/.
- ↑ van Leeuwen, Edwin J. C.; Cronin, Katherine A.; Haun, Daniel B. M. (November 2014). "A group-specific arbitrary tradition in chimpanzees (Pan troglodytes)" (in en). Animal Cognition 17 (6): 1421–1425. doi:10.1007/s10071-014-0766-8. ISSN 1435-9448. PMID 24916739. http://link.springer.com/10.1007/s10071-014-0766-8.
- ↑ Magazine, Smithsonian; Main, Douglas. "Some Chimps Are Putting Grass in Their Ears For No Particular Reason" (in en). https://www.smithsonianmag.com/smart-news/animal-fashion-some-chimps-are-putting-grass-ears-and-nobody-knows-why-180951888/.
 |  |
