Editing Gibbon (section)

===Hybrids===
Many gibbons are hard to identify based on fur coloration, so are identified either by song or genetics.<ref name=songs>{{cite journal |title=Songs of hybrid gibbons (''Hylobates lar'' × ''H. muelleri'') |author=Tenaza, R. |year=1984 |journal=American Journal of Primatology |volume=8 |issue=3 |pages=249–253 |doi=10.1002/ajp.1350080307 |pmid=31986810|s2cid=84957700 }}</ref> These morphological ambiguities have led to hybrids in zoos. Zoos often receive gibbons of unknown origin, so they rely on morphological variation or labels that are impossible to verify to assign species and subspecies names, so separate species of gibbons commonly are misidentified and housed together. Interspecific hybrids, within a genus, are also suspected to occur in wild gibbons where their ranges overlap.<ref>{{cite journal |author=Sugawara, K. |title=Sociological study of a wild group of hybrid baboons between ''Papio anubis'' and ''P. hamadryas'' in the Awash Valley, Ethiopia |year=1979 |journal=Primates |volume=20 |issue=1 |doi=10.1007/BF02373827 |pages=21–56|s2cid=23061688 }}</ref> No records exist, however, of fertile hybrids between different gibbon genera, either in the wild or in captivity.<ref name="Carbone et al. 2014"/>