Figure 1. a (left) Map of mountain treeshrew distribution
(inset modified from IUCN 2019), and map of Kinabalu Park, Sabah,
Borneo. Park boundaries are demarcated by dashed lines, transects by
black lines, and sampling locations by white circles. Shading indicates
lower and upper portion of mountain treeshrew habitat (900–2000 masl
and >2000 masl, respectively) b (right). Image of
a mountain treeshrew and a pitcher plant (Nepenthes lowii ),
Kinabalu National Park (Photo credit: Chien C. Lee). The two species
have a mutualistic relationship in which mountain treeshrews feed on the
sugary secretions provided by the plant and in turn provide the plant
nitrogen through feces (Chin, Moran, & Clarke, 2010).