What Is The Smallest Gibbon?

What Is The Smallest Gibbon? Hoolock gibbons are the second tallest gibbons. There are two species: … Hylobates or dwarf gibbons are the smallest gibbons. There are 7 species: … Nomascus gibbons are also called crested gibbons because of their distinctive hair. There are also 7 species: … Symphalangus or Siamang (Symphalangus syndactylus) How many