Though they are of similar
size (about 5.5kg), male and
female western hoolock
gibbons have very different
coloration – males such as
this have black fur and a
distinctive white brow
DR AXEL GEBAUER/NATUREPL.COM (CAPTIVE)
Though they are of similar
size (about 5.5kg), male and
female western hoolock
gibbons have very different
coloration – males such as
this have black fur and a
distinctive white brow
DR AXEL GEBAUER/NATUREPL.COM (CAPTIVE)