スミソニアン国立動物園のインスタグラム(smithsonianzoo) - 5月6日 23時25分

🥜Two peanuts sit on a tray. One is beneath the curve of a tool; the other is out of reach. 🐵👀 The Zoo's Allen’s swamp monkey, Nub Armstrong, is eyeing both. Will he use the tool that brings the peanut toward him? Researchers are hoping to find out! 🧠STORY: https://s.si.edu/2IVKrZj. (Link in bio.) 📧Get animals in your inbox! Sign up for Zoo e-news: https://s.si.edu/2uJxYh1.

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