アメリカ自然史博物館のインスタグラム(amnh) - 1月19日 23時37分

Have you ever heard of a deer that barks? The muntjac (Muntiacus muntjac), which lives in southeast Asia, makes bark-like noises to alert others of approaching predators. Humans who enter forests where this species lives sometimes rely on its bark as a warning signal for potential threats, like tigers. If attacked, the muntjac may bite its foe with its canine teeth.
Photo: Cloudtail the Snow Leopard, CC BY-NC-ND 2.0, flickr

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