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Last updated on April 18, 2014 at 17:24 EDT

Latest Colchester Zoo Stories

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2011-08-05 12:20:00

Experts say that monkeys learn to cover their eyes when they want to be left alone. Zookeepers at Colchester Zoo first noticed Milly, a 15-year-old mandrill, covering her eyes in 1999, when she was three. Staff thought at first she had poor eyesight or was just trying to shade her eyes from the sun. It was not until evolutionary biologist Mark Laidre of the University of California, Berkeley decided to take interest when the truth was realized about Milly. He spent 100 hours studying the...