grey gibbon, H. abbotti
**Eastern grey gibbon or northern grey gibbon, H. funereus
** Müller's gibbon or southern grey gibbon, H. muelleri
** Silvery gibbon, H. moloch
** Pileated gibbon or capped gibbon, H. pileatus
** Kloss's gibbon, Mentawai gibbon or bilou, H. klossii
* Genus Symphalangus