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any of several types of short-tailed South American monkeys with shaggy fur, humanlike ears, and distinctive bald faces that become flushed when the animal is excited. In two of the three colour forms, the face is bright red. Uakaris are about 35-50 cm (14-20 inches) long, excluding their strangely short 15-20-cm nonprehensile, or nongrasping, tails