スミソニアン国立動物園のインスタグラム(smithsonianzoo) - 9月9日 01時33分

As our great apes prepare to go to sleep, they make their beds, then settle in. Just like their wild counterparts, orangutans in zoos build cozy nests! Where an orangutan chooses to snooze at night can give keepers insight into their social preferences. ?? CURATOR Q&A: https://s.si.edu/2NUTdFA. (Link in our profile.)

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