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ROME, ITALY - NOVEMBER 03: An Emperor Tamarin monkey is seen inside the new area dedicated to the world's smallest monkeys at the Bioparco on November 3, 2011 in Rome, Italy. The area, dedicated to the world's smallest monkeys, contains four Usit, two Tamarin Emperor and two Cotton-Top Tamarine, that are part of EEP, the European Programme for the conservation of species. (Photo by Giorgio Cosulich/Getty Images)

ROME, ITALY - NOVEMBER 03:  An Emperor Tamarin monkey is seen inside the new area dedicated to the world's smallest monkeys at the Bioparco on November 3, 2011 in Rome, Italy. The area, dedicated to the world's smallest monkeys, contains four Usit, two Tamarin Emperor and two Cotton-Top Tamarine, that are part of EEP, the European Programme for the conservation of species. (Photo by Giorgio Cosulich/Getty Images)