ABOVE: Kalimantan Langur Presbytis frontata is the most widespread but the shyest of the 4 species of  Grey Langurs found in Borneo. All 4 species are endemic to Borneo and found nowhere else in the world.

165Grey Langurs for web
As illustrated above four separate closely related Presbytis Grey Langurs are found in  forested Borneo.  Males and females differ but there is very great variation between sexes which has caused much taxonomic confusion in the past. Examination of photographs appears to show that non-breeding females i.e. youngsters and elderly females often resemble males rather than females. The reason why is still unclear.

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