How Many Visitors Can a Koala Bear?

Everyone's favorite Australian bear doesn't care for all the attention it gets, Nature World News reports. In fact, humans have a negative effect on koala bears and can stress them out just by being close by or noisy. After observing the little guys at the zoo, researchers found that they become more vigilant, or stressed, as the number of visitors and noise increase. The finding, published this month in Applied Animal Behaviour Science, raises questions about whether people should be able to have close encounters with koalas.

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