Pileated gibbon
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The pileated gibbon (Hylobates pileatus) is a primate in the gibbon family, Hylobatidae.
The pileated gibbon has sexual dimorphism in fur coloration: males have a purely black fur, while the females have a white-grey colored fur with only the belly and head black. The white and often shaggy hair ring around the head is common to both sexes.