The project has identified four of the five felids on Borneo: Sunda clouded leopard (Neofelis diardi; macan dahan), flat-headed cat (Prionailurus planiceps; kucing tandang), marbled cat (Pardofelis marmorata; kucing batu) and leopard cat (Prionailurus bengalensis; kucing kuwuk). All of these species are protected by Indonesian Law (PP. 7/1999) and are listed on the IUCN Red List. The four species have clearly defined activity budgets, especially the smaller cats, to allow niche partitioning. We have identified this forest block as an important area for numbers of all four species in the global context of cat populations. The bay cat (Pardofelis badia (kucing merah) has not been found in tropical peat-swamp forest at time of writing.

We report the first in-depth evidence of targeted mushroom foraging in an Asian colobine. Using direct observations (2010–2018) and camera traps (2008–2018) in the Sebangau Forest, Central Kalimantan, Indonesian Borneo, we show how adult female red langurs (Presbytis rubicunda) are regularly descending to the ground to consume mushrooms. We recorded 82 counts (0.36% of all focal observations, n = 25,502) of the focal adult langur on the ground from direct observations of habituated groups, and 80 independent images/videos of red langurs on the ground were obtained from the camera traps representing 1.12% of total images (n = 7,145). Mushroom consumption took place in 4 families, representing 0.04% of total focal behaviour observations and 24.3% of total time feeding on the ground. From the camera trap photos, red langurs are spending 20% of time on the ground feeding. We speculate that mushrooms could be a supplementary food for adult female langurs as there is an increase in consumption in April and November.